# Questions Asked onNovember 14, 2012

1. ## Chemistry Help

Write the net ionic equation for the reaction of calcium nitrate and sodium phosphate

2. ## Physics

A soccer ball kicked on a level field has an initial vertical velocity component of 15 meters per second. Assuming the ball lands at the same height from which it was kicked, what is the total time the ball is in the air? [Neglect friction.]

3. ## math

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges \$960/person/day if exactly 20 people sign up for the cruise. However, if more than 20 people sign up (up to the maximum capacity of 100) for the cruise, then each fare is

Mrs. Miller sells a house for \$179,000. If she earns a commission of 6%, how much money does she earn? Write a proportion and show your work.

5. ## English

In the story Sunjata... Why do the sorceresses agree to kill Sunjata? A.Sunjata declined his father's cows. B.Sunjata had befriended Jelimusoni Tunku Manyan Diawara. C.Dankaran Tuman's offer was better than Sunjata's. D.Dankaran Tuman had promised them a

1. Rename four-sevenths as a percent. Round to the nearest tenth of a percent if necessary. (1 point) 47% 1.8% 57.1% 28% 2. Rename .709 as a percent. (1 point) 709% 70.9% 79% 7.09% 3. If one-third is equivalent to 33thirty-three and one-third%, what

7. ## statistics

A researcher reports an F-ratio with df = 2, 36 from an independent-measures research study. Based on the df values, how many treatments were compared in the study and what was the total number of subjects participating in the study? a. 2 treatments and 37

1. Rename four-sevenths as a percent. Round to the nearest tenth of a percent if necessary. (1 point) 47% 1.8% 57.1% 28% 2. Rename .709 as a percent. (1 point) 709% 70.9% 79% 7.09% 3. If one-third is equivalent to 33thirty-three and one-third%, what

9. ## Chemistry

a diver exhales a bubble with a volume of 250 mL at a pressure of 2.4 atm and a temperature of 15 degrees celcius. What is the volume of the bubble when it reaches the surface where the pressure is 1.0 atm and the temperature is 27 degrees celcius

10. ## Physics

The brakes of a truck cause it to slow down by applying a retarding force of 8740 N to the truck over a distance of 1130 m. What is the work done by this force on the truck?

11. ## earth

HELP? Two students are given cubic boxes, measuring 10 cm on a side. Robert puts a single glass marble with a diameter of 10 cm in the box. Susan puts 1,000 1-cm glass marbles in her box. 1.Whose box has more empty space? Explain. 2.Whose box will be

12. ## Statistics

A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following

13. ## Grammar

Which of the following is a complex sentence? A.After the class, we all went to Alec's house. B.Alec's brother John was home, but his sister Cynthia wasn't. C. Alec suggested we all go to the neighborhood pool. I'm thinking the answer is A, but I'm not too

14. ## math

Suppose the total cost function for manufacturing a certain product C(x) is given by the function below, where C (x) is measured in dollars and x represents the number of units produced. Find the level of production that will minimize the average cost.

15. ## algebra

The table shows the amount of milk that Wisconsin dairy farms produced from 1940 to 1997. Use linear model to estimate milk production in 1990. year milk produced 1940 7 1972 7 1997 8 15.1 12.5 7.5 2.5

16. ## statistics

An analysis of variances produce SSbetween = 30, SSwithin = 60, and an F-ratio with df = 2, 15. For this analysis, what is the F-ratio? a. 30/60 = 0.50 b. 60/30 = 2.00 c. 15/4 = 3.75 d. 4/15 = 0.27

17. ## chem

Given the concentrations, calculate the equilibrium constant for this reaction: I2(g) + Cl2(g)---> 2ICl(g) At equilibrium, the molar concentrations for reactants and products are found to be I2 = 0.50M, Cl2 = 0.60M, and ICl = 5.0M. What is the equilibrium

18. ## algebra

which polynomial has a graph that passes through the given points? (-3,10),(-1,0),(0,-5),(3,52). y=x^3-4x^2+2x-5 y=x^3+4x^2-2x-5 y=x^3+4x^2+2x-5 y=x^4+4x^3-2x^2-5x If someone could walk me through I'd be thankful

19. ## chemistry

When 50.0mL of 1.20 M of HCl (aq)is combined with 50.0mL of 1.30 M of NaOH (aq) in a coffee-cup calorimeter, the temperature of the solution increases by 8.01 Degrees C. What is the change in enthalpy for this balanced reaction? HCl(aq) + NaOH(aq)

20. ## Difficult Trig Word Problem

The displacement of a spring vibrating in damped harmonic motion is given by y(t) = 4e^-3t sin(2pi*t) where y = displacement and t = time with t greater than/equal to zero. Find the time(s) when the spring is at its equilibrium position (y=0). The number

21. ## SOCIAL STUDIES

WHICH OF THE FOLLOWING STATEMENTS SUPPORTED BY THE INFORMATION IN THE MAP 1] AUSTRASLIA IS SELF-SUPPORTING IN OIL.2]AFRICA TRADES OIL ONLY WITH SOUTH AMRICA.3] THE SOVIET UNION HAS TRADE ROUTES WITH EVERY MAJOR CONTINENT.4] ALL OF THE MAJOR CONTINENTS HAVE

22. ## Chemistry

Calculate delta H for the reaction below using Hess's Law: C2H6 ---> C2H2 + 2H2 ------------------------------------------ C2H2 + 5/2O2 --> 2CO2 + H2O (H = -1300 kJ) 2H2 + O2 --> 2H2O (H= -572 kJ) 2C2H6 + 7O2 --> 4CO2 + 6H2O (H= -3120 kJ)

23. ## Physics

An aluminum bar has the desired length when at 10 degrees Celsius. How much stress is required to keep it at this length if the temperature increases to 33 degrees Celsius?

24. ## Math for Ms. Sue Or Steve

Use an equation to solve the problem. 1. What is 57% of 11? a. 11 = 0.57 • n; 19.3 b. n = 57 • 11; 627 c. n = 0.57 • 11; 6.27*** d. 11 = 57 • n; 0.19 2. 224 is 25% of what number? a. 224 • 0.25 = w; 560 b. 224 = 0.25 • w; 896 c. 224 • 0.25 =

25. ## Physics

Lead has a density of 11300 kg/m^3 at 0 degrees celcius. What is the density of lead at 90 degrees celcius?

26. ## Pre-Algebra

A bag contains 10 white golf balls and 6 striped golf balls. A golfer wants to add 112 golf balls to the bag. He wants the ratio of white to striped golf balls to remain the same. How many of each should he add?

27. ## Chemistry

What is the total volume of gases produced at 819 K and 1. atm pressure when 320 g of ammonium nitrite undergoes the following decomposition reaction? NH4NO2 --------> N2(g) + 2H2O(g)

28. ## Quantitative Analysis

The dibasic compound B (pKb1 = 4.00, pKb2 = 8.00) was titrated with 1.00 M HCl. The initial solution of B was 0.100 M and had a volume of 100.0 mL. Find the pH at the following volumes of acid added and make a graph of pH versus Va; Va=0, 1, 5, 9, 10, 11,

29. ## chemistry

At constant pressure and 25 degrees C, what is delta H for the reaction 2C2H6(g) + 7O2(g) --yields-- 4CO2(g) + H2O(l) if the complete consumption of 11.3 g of C2H6 releases -586.3 kJ of heat energy? (11.3=.38 mol C2H6)

30. ## Chemistry

How many Moles of solute particles are present in 1 mL of aqueous 0.070 M (NH4)2CO3? ____ mol of Particles

31. ## Social Studies

I was wondering if I could check my answers with someone. I'm a bit confused with interest. I put stars next to the answers I chose. Thank you. An interest rate is a special type of (1 point) loan. **price. bank. service. 2. How does a compound interest

32. ## chemistry

a tank contains helium gas at 490 mmHg, nitrogen gas at 0.75 atm, and neon at 520 torr. What is the total pressure in atm?

33. ## Stats

About 35% of the population has blue eyes (based on a study at Indiana University). a. If someone is randomly selected, what is the probability that he or she does not have blue eyes?

34. ## Chemistry

A 100.0 mL aliquot of 0.100 M weak base B (pKb=5.00) was titrated with 1.00 M HClO4. Find the pH at the following volumes of acid added Va= 0, 1, 5, 9, 9.9, 10, 10.1, and 12mL

35. ## algebra

Wind farms are a source of renewable energy found around the world. The power P(in kilowatts) generated by a wind turbine varies directly as the cube of the wind speed v(in meters per second) If a turbine generates 500kW in a 10m/s wind, how much power

36. ## English - Ms. Sue

I hope you know this story.. Sunjata... Why do the sorceresses agree to Sunjata's offer? A.They like him better than Dankaran Tuman. B.Their real desire was for meat. C.They prefer antelope to bull meat. D.Sunjata was the son of a Condé woman. I think it

37. ## Physics

Two astronauts, each having a mass M are connected by a length of rope of length d have a negligible mass. They are isolated in space, orbiting their center of mass at an angular speed of ù0. By pulling on the rope, one of the astronauts shortens the

38. ## Chemistry

The question representing the production of tetraphosphorus trisulfide (P4S3), a substance used in some match hears, is 8P4 + 3S8 ---> 8P4S3. Determine if each of the following statements is correct. If the statement is incorrect, rewrite it to make it

39. ## Math

A fly starts out 2 meters from a light bulb, flies closer to the light then farther away, 2 meters again. At this point the fly goes toward the bulb again but hits the bulb and flies away. Find a function (it may be piecewise) that gives the distance of

40. ## statistics

For an independent-measures ANOVA comparing three treatments with a sample of n = 5 in each treatment, what is the critical value for the F-ratio using α = .05? a. 3.88 b. 3.49 c. 3.74 d. 3.34

41. ## Calculus

A wire 4 meters long is cut into two pieces. One piece is bent into a square for a frame for a stained glass ornament, while the other piece is bent into a circle for a TV antenna. To reduce storage space, where should the wire be cut to minimize the total

42. ## Chemistry

An unknown gaseous hydrocarbon consists of 85.63% carbon by mass. A 0.335 g sample of the gas occupies a volume of 0.107 L at STP. What is the identity of the gas?

43. ## physic

a ball rolls off a desk at a speed of 3.0m/s and lands 0.40 seconds later. How far from the base of the desk does the ball lands?

45. ## physics

A satellite has a mass of 106 kg and is located at 1.96 106 m above the surface of Earth. (a) What is the potential energy associated with the satellite at this location? J (b) What is the magnitude of the gravitational force on the satellite? N

46. ## algebra

a polynomial equation with rational coefficients has the roots 7+sgrt3, 2-sgrt6 find two additional roots 7-sgrt3, 2+sgrt6 3-sgrt7, 6+sgrt2 7+sgrt3, 2-sgrt6 3+sgrt7, 6=sgrt2 could someone help

47. ## english

Choose the word needing an apostrophe or an apostrophe and an s. If the sentences is correct, choose no error. 1. Why havent you dotted your j’s? haven’t **** j’s’ no error 2. Ounce for ounce, humans aren’t as strong as most insects. human’s

48. ## SOCIAL STUDIES

WHICH OF THE FOLLOWING STATEMENTS IS BEST SUPPORTED BY THE NEW STUDIES

49. ## Math

The weekly demand for the Pulsar 25-in. color console television is given by the demand equation p=-0.05x+502 (0(less than or equal too)x(less than or equal too)12,000) where p denotes the wholesale unit price in dollars and x denotes the quantity

50. ## chemistry

A 94.7 g sample of silver (s= 0.237 J/(g x Degree C)), initially at 348.25 Degrees C , is added to an insulated vessel containing 143.6 g of water (s=4.18 J/(g x Degree C)), initially at 13.97 Degrees C. At equilibrium, the finial temperature of the

51. ## physics

A 2.25 kg ball experiences a net force of 965 N up a ramp. Once the ball reaches the top of the ramp, the force no longer acts. The force acts over a distance of 1.50 m on the ramp. Find the horizontal distance x that the ball travels before it hits the

52. ## grammar

The patient was placed in the wheelchair with the fractured tibia. A Verb tense agreement error B Subject/verb agreement error C Pronoun agreement error D Modifier placement error E Parallel structure error My answer is c

53. ## physics, help! urgent!

A positive point charge q = +2.50 nC is located at x = 1.20 m and a negative charge of ƒ{2q = ƒ{5.00 nC is located at the origin. (a) Sketch the electric potential verses x for points on the x-axis in the range -1.50 m < x < 1.50 m. (b) Find a symbolic

54. ## math

Paul is making loaves of raisin bread to sell at a fundraising event. The recipe calls for 1/3 cup of raisins for each loaf, and Paul has 3 1/4 cups of raisins a) How many loaves can Paul make? b) How many cups of raisins will he have left over? Go step by

55. ## chemistry

An ideal gas is allowed to expand isothermally from 2.00 L at 5.00 atm in two steps: a) against a constant external pressure of 3.00 atm, followed by b) against a constant external pressure of 2.00 atm. Calculate q and w. (101.33 J = 1 L atm)

56. ## Stoichiometry

How many grams of oxygen are required to completely burn 85.6 grams of methane (CH4)? CH4 + O2 → H2O + CO2

57. ## chemistry

a chemist puts 6 moles of nitrogen gas and 7 moles hydrogen gas into an evacuated 1 liter container. The system reaches equilibrium at a certain temperature according to the process outlined above. when the system is at equilibrium the chemist determines

58. ## Pre-Algebra

A bag contains 10 white golf balls and 6 striped golf balls. A golfer wants to add 112 golf balls to the bag. He wants the ratio of white to striped golf balls to remain the same. How many of each should he add?

59. ## Algebra/Math

A total of 504 tickets were sold for the school play. They were either adult tickets or student tickets. The number of student tickets sold was three times the number of adult tickets sold . How many adult tickets were sold?

60. ## algebra

what is a quartic function with only the two real zeros given x=5 and x=1 y=-x^4-6x^3+6x^2-6x+5 y=x^4+6x^3-6x^2-5 y=x^4-6x^3+5x^2-6x+6 y=x^4-6x^3+6x^2-6x+5 can someone explain

61. ## science

15. Two 5 dm3 flasks are connected by by a narrow tube of negligible volume. Initially the two flasks are both at 27 oC and contain a total of 2 moles of an ideal gas. One flask is heated to a uniform temperature of 127 oC while the other is kept at 27 oC.

62. ## English - Ms.Sue

Hopefully you know the story "from Sunjata".... What saves Sunjata in the end? A.his popularity B.God's blessing C.his generosity D.his friendship with a sorceress I think it's B....?

63. ## Calculus

The velocity of a particle moving along the x-axis is given by f(t)=6-2t cm/sec. Use a graph of f(t)to find the exact change in position of the particle from time t=0 to t=4 seconds.

64. ## math

The daily total cost (in dollars) incurred by Trappee and Sons for producing x cases of TexaPep hot sauce is given by the following function. c(x)=0.000002x^3+3x+453 (a) Find the average cost function C. C = ? (b) Find the level of production that results

65. ## physics HELPP!!!!!!!

A beam resting on two pivots has a length of L = 9.00 m and mass M =89.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot placed a distance 4.00 m from the left end exerts a normal force n2. A woman of mass m=

66. ## chemistry

The standard molar heat of fusion of ice is 6020 J/mol. Calculate q, w, and ∆E for melting 1.00 mol of ice at 0◦C and 1.00 atm pressure.

67. ## Vocab2

A group that has exclusive business rights and titles. A. Company B. Corporation C. Investment D. Proprietorship I say b

68. ## physics

A helicopter hovering above a forest fire dumps a large bucket of water. How far does the water fall during the third second?

69. ## PHYSICS

Lead has a density of 1.13 104 kg/m3 at 0°C. (a) What is the density of lead at 86°C? ___kg/m3 (b) Based on your answer to part (a), now consider a situation in which you plan to invest in a gold bar. Would you be better off buying it on a warm day? Yes

70. ## 7th Grade Math help ASAP only 2 questions

I have absolutely no idea what these questions are. Can you help? And can you tell me how to solve them? thanks. 6. The bill at a restaurant is \$58.50, and Mrs. Johnson wants to leave a 15% tip. Approximately how much money should she leave? (1 point)

71. ## MATH

A box with an open top has vertical sides, a square bottom, and a volume of 4 cubic meters. If the box has the least possible surface area, find its dimensions. Length of base= Height=

73. ## SOCIAL STUDIES

WHICH STATEMENTS BEST SUMMARIZES THE PARAGRAPH'S MAIN POINT? PLEASE

74. ## SOCIAL STUDIES

WHICH OF THE FOLLOWING STATEMENTS IS SUPPORTED BY INFORMATION IN THE MAP 1] THE U.S GOVERMENTS WET TO WAR WITH FRANCE IN 1803 TO GAIN TERRITORY WEST OF THE MISSISSIPPI RIVER.2]IN 1865 THE U.S ECONOMY PRODUCED RAW MATERIALS TO BE EXCHANGED ABROAD FOR

75. ## Vocab

Basing the Results on Probability A. Calculation B. Abstraction C. Classification D. Relation I am saying calculations

76. ## Physics

Block A of mass 2.0 kg and Block B of 8.0 kg are connected by a spring of spring constant 80 N/m and negligible mass. The system is being pulled to the right across a horizontal frictionless surface by a horizontal force of 4.0 N, with both blocks

77. ## the parts of speech

10. In the following sentence, identify the part of speech of the italicized word. Catching fish is one of the oldest pastimes.

78. ## PHYSICS

An air bubble has a volume of 1.65 cm3 when it is released by a submarine 105 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume the temperature and the number of air molecules in the bubble remain constant

79. ## statistics

An analysis of variance is used to evaluate the mean differences for a research study comparing three treatments with a separate sample of n = 6 in each treatment. If the data produce an F-ratio of F = 4.10, then which of the following is the correct

80. ## Chemistry

A 5.0g KBr sample, at 25 degrees celsius, dissolved in 25 ml of water, also at 25 degrees celsius. the final equilibrium temperature of the resulting solution is 18.1 degrees celsius, What is the enthalpy change in J/g and KJ/mole of KBr.

81. ## Chemistry

A 3.80 L cylinder contains 6.83g of methane, CH4, at a pressure of 3320 mmHg. What is the temperature of the gas? I know you use the formula PV= nRT, but I can't seem to get two sides equal each other, thus having the wrong temp. My guess is that I have to

82. ## algebra

find all zeros of the equation -3x^4+27x^2+1200=0 If someone could explain it would be helpful

83. ## SOCIAL STUDIES

WHICH ONE OF THE FOLLOWING CONCLUSIONS IS SUPPORTED BY THE RESULTS OF THESE STUDIES PLEASE HELP ME

84. ## Chemistry

A solution has a %T value of 75.4% at 600 nm. What is the absorbance of this solution at this wavelength?

85. ## math

The quantity demanded each month of the Sicard wristwatch is related to the unit price given by the equation below, where p is measured in dollars and x is measured in units of a thousand. To yield a maximum revenue, how many watches must be sold? (Round

86. ## Chemistry

What is the wavelength in Angstroms of radiation that has a frequency of 4.00 x 10^14 s-1? I tried the equation wavelength= constant / frequency. And the fact that 1 Angstrom = 1x 10^-10 m, but I don't see how the correct answer turns out to be 7.5 x 10^3

87. ## PHYSICS

The Trans-Alaskan pipeline is 1300 km long, reaching from Prudhoe Bay to the port of Valdez, and is subject to temperatures ranging from -72°C to +38°C. (a) How much does the steel pipeline expand due to the difference in temperature? (The coefficient of

88. ## Analytic Geometry

Please help. I've been trying to solve these for more than an hour now but I can't seem to get it. 1) The segment joining (-4,7), (5,-2) is divided into two segments, one of which is 5 times as long as the other. Find the point of division. 2) The segment

89. ## Physics

Steam of mass 11.0 g at 100°C is added to 114.8 g of ice at 0.00°C. Find the final temperature of the system.

90. ## Intro to Physics

An air bubble has a volume of 1.65 cm3 when it is released by a submarine 105 m below the surface of a lake. What is the volume of the bubble when it reaches the surface? Assume the temperature and the number of air molecules in the bubble remain constant

91. ## 7th grade math correct 2 and help 1

6. The bill at a restaurant is \$58.50, and Mrs. Johnson wants to leave a 15% tip. Approximately how much money should she leave? (1 point) about \$15.00 about \$9.00 about \$6.00 about \$11.00 8. What percent of 50 is 12.5? (1 point) 4% 25% 40% 15% 9. 50 is

92. ## Physics

A car with 60 cm diameter tires is traveling at a constant speed of 100 km/hr. What is the angular velocity of the tires in rad/s?

93. ## adverbs and other parts of speech

3. Which one of the following sentences does not contain a prepositional phrase?

94. ## chemistry

consider the following changes at constant temperature & pressure H2O(s) --yields-- H20(l); Delta H1 H2O(l) --yields-- H2O(g); Delta H2 H2O(g) --yields-- H2O(s); Delta H3 Using Hess's law, the sum of the deltas is a. equal to 0 b. sometimes greater than

95. ## algebra

Can someone please explain and help me with this problem. 4. The table shows the annual consumption of cheese per person in the United States for selected years in the 20th century. Year Pounds Consumed 1908 5.027 1923 8.768 1960 12.29 1981 15.485 What

96. ## math

Phillip, the proprietor of a vineyard, estimates that the first 9600 bottles of wine produced this season will fetch a profit of \$5 per bottle. However, the profit from each bottle beyond 9600 drops by \$0.0002 for each additional bottle sold. Assuming at

97. ## Problem solving

Look at the number 13,15,19,25 Describe the pattern.

98. ## biology

define natural selection

99. ## MATH

LAST YEAR BOB'S AGE WAS A SQUARE NUMBER AND NEXT YEAR IT WILL BE A CUBE NUMBER. HOW OLD IS BOB NOW ? PLEASE EXPLAIN HOW YOU WORK IT OUT ,THANKS

100. ## physics

A dentist's drill starts from rest. After 2.50 s of constant angular acceleration it turns at a rate of 3.0 104 rev/min. (a) Find the drill's angular acceleration. rad/s2 (b) Determine the angle (in radians) through which the drill rotates during this

101. ## Math

Write an algebraic expression to represent the cost of a concert ticket,h, with a service charge of \$6.75.

102. ## Math

What is another way to write the expression 44n? 44÷n?

103. ## subtraction (math)

How do you find 81 - 16 using mental math?

A beam resting on two pivots has a length of L = 9.00 m and mass M =89.0 kg. The pivot under the left end exerts a normal force n1 on the beam, and the second pivot placed a distance 4.00 m from the left end exerts a normal force n2. A woman of mass m=

105. ## Physics - Bernouli

Water flows with constant speed through a garden hose that goes up a step 20.0 cm high. 1. If the water pressure is 143 kPa at the bottom of the step, what is its pressure at the top of the step? Now suppose the cross sectional area of the hose at the top

106. ## physics

A certain light truck can go around a flat curve having a radius of 150 m with a maximum speed of 34.0 m/s. With what maximum speed can it go around a curve having a radius of 60.0 m?

107. ## math

Phillip, the proprietor of a vineyard, estimates that the first 9600 bottles of wine produced this season will fetch a profit of \$5 per bottle. However, the profit from each bottle beyond 9600 drops by \$0.0002 for each additional bottle sold. Assuming at

108. ## Physics

If 9.30 x 10^5 J of energy are transferred to 2.00kg of ice at 0 deg C, what is the final temperature of the system?

109. ## chem

Among the elementary subatomic particles of physics is the muon, which decays within a few nanoseconds after formation. The muon has a rest mass 1.126 109 times that of a proton. Calculate the de Broglie wavelength associated with a muon traveling at a

110. ## Chemistry

A weak acid HA (pKa = 5.00) was titrated with 1.00 M KOH. The acid solution had a volume of 100.0 mL and a molarity of 0.100 M. Find the pH at the following volumes of base added and make a graph of pH versus Vb: Vb = 0, 1, 5, 9, 9.9, 10, 10.1, and 12 mL.

111. ## algebra

Can someone please explain What polynomial has a graph that passes through the given points? (–4, 89), (–3, 7), (–1, –1), (1, –1), (4, 329) y = 2x3 – 3x2 – 2x + 1 y = 1x4 – 2x3 – 3x2 + 2x + 1 y = x4 – 2x3 + 3x2 + 2x – 1 y = x4 + 2x3

112. ## PHYSICS

At what temperature would the rms speed of a nitrogen atom equal the following speeds? (Note: The mass of a nitrogen atom is 2.324 10-26 kg.) (a) the escape speed from Earth, 1.12 104 m/s _____K (b) the escape speed from the Moon, 2.37 103 m/s _____K

113. ## Calculus

If an object is moving along the curve y=x^3, at what points is the y-coordinate changing 3 times more rapidly then the x-coordinate?

114. ## physics

Use the data of this table to find the point between Earth and the Sun at which an object can be placed so that the net gravitational force exerted by Earth and Sun on this object is zero.

115. ## physics

a steel ball rolls with a constant velocity across a tabletop 0.91 m high. it rolls off the table and hits the ground 0.77 m from the edge of the table. how fast was the ball rolling?

The following proportion could be used to change from gallons to which measure. 1 3 customary capacity: - = - 1 Gallon=4 quarts 4 X 1 Gallon=128 fluid ounces 1 quart=2 pints 1 pint=2 cups 1 cup=8 fluid ounces A. ounces B. pints C. quarts D. gallons

117. ## physics

A hockey puck with mass 0.160kg is at rest on the horizontal, frictionless surface of a rink. A player applies a force of 0.310N to the puck, parallel to the surface of the ice, and continues to apply this force for 1.60s. What is the (a)position and

118. ## Intro to Physics

The Trans-Alaskan pipeline is 1300 km long, reaching from Prudhoe Bay to the port of Valdez, and is subject to temperatures ranging from -72°C to +38°C. (a) How much does the steel pipeline expand due to the difference in temperature? (The coefficient of

119. ## Algerbra 1

You have a coupon for \$50 off your camera purchase of \$100 or more at Zeke's Camera World. Write a function relating a camera's purchase price, y, to the retail price, x. Give the domain of this function.

120. ## chemistry

2. When 0.354 g of an unknown nonelectrolyte compound was dissolved in 12.5 g of benzene a solution was formed that froze at 4.46°C. (a) Calculate the molar mass of the unknown compound. The freezing point of benzene is 5.48°C, and the Kf of benzene is

121. ## PHYSICS

The average coefficient of volume expansion for carbon tetrachloride is 5.81 10-4 (°C)−1. If a 42.5-gal steel container is filled completely with carbon tetrachloride when the temperature is 10°C, how much will spill over when the temperature rises to

122. ## Physics

A car with 60 cm diameter tires is traveling at a constant speed of 100 km/hr. What is the angular velocity of the tires in rad/s?

123. ## Finance

Arena Distributors is a new company and currently pays no dividends. The company has just reported earnings of \$1.5 per share and its earnings are expected to grow at a 15 percent annual rate over the next four years. Following this four-year high growth

124. ## Physics

A 1000 kg car traveling at 72 km/h strikes a concrete wall and comes to a full stop in 2 sec. What is the average force of impact exerted on the car?

125. ## Precalculus

Prove or disprove cos(x+y)cos(x-y)=cos squared (x) - Sin squared (x) I dstributed the cosines and attempted to cancel out terms but I can't get the signs right. Any help on what I am missing?

126. ## Chemistry

How do you balance the equation? MnO4^-1(aq) + C2O4^-2(aq)-> Mn^+2(aq) + CO2(g)

127. ## Intro to Physics

At what temperature would the rms speed of a nitrogen atom equal the following speeds? (Note: The mass of a nitrogen atom is 2.324 10-26 kg.) (a) the escape speed from Earth, 1.12 104 m/s ___________K (b) the escape speed from the Moon, 2.37 103 m/s

128. ## Math

Write an algebraic expression to represent the cost of m gallons of gasoline if each gallon costs \$1.45 Is this right M-\$1.45

A charge Q = +4.5 uC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 uC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the

130. ## Chemistry

Which two types of steel appear to have their properties combined in tempered steel?

131. ## Physics

Runner A is running at a constant rate of 2.3 m/s when he passes runner B who is stationary. Runner A continues running at a constant pace, and Runner B begins to run 4 seconds after Runner A just passes him. If Runner B is accelerating at a rate of .5

132. ## AP Physics B

If the system shown in Figure P8.29 is set in rotation about each of the axes mentioned in problem 29, find the torque that will produce an angular acceleration on 1.5 rad/s2 in each case.

133. ## Math

If exactly 198 people sign up for a charter flight, Leisure World Travel Agency charges \$308/person. However, if more than 198 people sign up for the flight (assume this is the case), then each fare is reduced by \$1 for each additional person. Hint: Let x

134. ## Math

A line horizontally drawn from the center of the circle. A. Radius B. Axiom C. Circumference D. Vertex I chose a and I was told I was wrong Help please

135. ## calculus

A five feet piece of wire is cut into two pieces. One Piece is bent into a square and the other is bent into an equilateral triangle. Where should the wire be cut so that the total area enclosed by both is minimum.

136. ## algebra

Write the expression in a single natural logarithm. 3 ln a - 0.5 (ln b + ln c^2)

137. ## Science

A car of mass 1190 kg is on an icy driveway inclined at an angle of 28◦ If the incline is frictionless, what is the acceleration of the car?

138. ## MATH

A SCHOOL IS DIVIDED INTO 4 HOUSES P,Q,R,S. ON SPORTS DAY,STUDENTS LINE UP SO THAT A STUDENT FROM P IS FIRST IN LINE,THEN A STUDENT FROM Q THEN A STUDENT FROM R THEN A STUDENT FROM S THEN A STUDENT FROM P AND SO ON WITH SAME ORDER REPEATING .FROM WHAT HOUSE

139. ## biology

9. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 10. For the radar in #9 above, how many seconds will it take for a signal to reach an airplane 15 km away, and return

140. ## Language

What part of speech are the following words this, of, books, sighed, heavily, doctor,ask, you, address, auscultated, are, bruits, read, last, and, my, will follow up, yesterday, tomorrow, gift, call it, present, always, on

141. ## Chemistry

At 22C(Celsius) an excess amount of a generic metal hydroxide M(OH)2 is mixed with pure water. The resulting equilibrium solution has a pH of 10.14. What is the Ksp of the salt at 22C? Help Please

142. ## math

If Rhonda buys six 12-packs of fruit snacks for \$14.40 how much does each fruit snack cost?

143. ## physics

An electric motor rotating a workshop grinding wheel at a rate of 9.80 101 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 2.00 rad/s2. (a) How long does it take for the grinding wheel to stop? s (b)

144. ## Chemistry

calulate the molality of solution that contains 51.2g C10H10 in 500mL of CCl4. the density of CCl4 is 1.6g/mL

145. ## math

write the number in standard notation 1.42 * 10 to the -2 power

146. ## Chemistry

What is the energy in Joules of a mole of photons of microwave light having a frequency typical of microwave? (frequency = 3.0 x 10^9 Hz) I tried using the equation E= h x frequency, but I ended up with the answer 1.98 x 10^-24 instead of the correct

147. ## Chemistry

50mL of water at 46.9 degrees Celsius were mixed with 50mL of water at 25.2 degrees Celsius in a calorimeter also at 25.1 degrees Celsius. the final temp was 30.1 Celsius. assuming that neither the desity of water nor its specific heat capacity changed

148. ## math

one band has 30 speakers. they stack them at least 3 high, but no taller than 8 high. what are all the different arrays they can make?

149. ## American History

1. Believing that truth is what works for actual real people, Harvard psychologist William James developed the philosophy of (A. pragmatism.) B. social progressivism. C. radical progressivism. D. social idealism. 2. Which of the following was true of

150. ## chemistry

Consider an insulated system containing 150 g of liquid water and 150 g of ice at equilibrium under atmospheric pressure. A total of 22g of steam at 120◦C is admitted to the system. What is the phase composition and temperature when equilibrium is

151. ## Physics

The Trans-Alaskan pipeline is 1300 km long, reaching from Prudhoe Bay to the port of Valdez, and is subject to temperatures ranging from -72°C to +38°C. (a) How much does the steel pipeline expand due to the difference in temperature? (The coefficient of

152. ## physics 100

What minimum speed does a 160 puck need to make it to the top of a 5.4 -long, 24 frictionless ramp?

153. ## Grammar

Choose the correctly punctuated sentence: A) I am sorry to say, however, that I am not looking forward to the holidays. B) I am sorry to say however that I am not looking forward to the holidays. C) I am sorry to say, however that I am not looking forward

154. ## Physics

a car that weights 15000 N is initially moving at 60 km/hour when the brakes are applied. The car is brought to a stop at 30 meters. Determine the magnitude of the braking force

155. ## Math

Michaels car has a 18.0 gallon tank. If the tank has 5.5 gallons what fraction of the tank is full?

156. ## math

how do you write the number words for 0.03. Is it three hundredths.(2)and the number words for 0.76,is it seven tenths,six hundredths

157. ## Chemistry

Which two types of steel appear to have their properties combined in tempered steel?

158. ## statistics

Which of the following is NOT true with respect to the properties of probability? 0 < x < 1 P(S) = 1, where S is the sample space P(A) + P(Ac) = 0 If two events are independent then P(A and B) = P(A) * P(B)

159. ## chemistry

Consider the conditions listed in the table below. Gas Temperature Pressure H2 100 oC 1 atm CH4 100 oC 20 atm O2 373 K 1 atm CO2 373 K 10 atm Which describes the characteristics of these samples? I. All molecules have the same kinetic energy II. The

160. ## physics

134 g of water at 7°C is added to ice at 0°C. If the final temperature of the system (which you can assume is isolated) is 0°C, determine HOW MUCH ICE MELTED. The specific heat of water is 4186 J/kg·°C. The latent heat of fusion for H2O is 335,000

161. ## chemistry

The problem statement, all variables and given/known data When 5.00 g of NaOH(s) are added to 100 g of water using a calorimeter (with Cp = 493.24 J/K), the temperature rises from 25.0 to 37.5 °C. Calculate the molar heat of solution.

162. ## Math

First period: 85, 83, 74, 70, 88,95,89,72,90,83,77,91,98,89,82,84 Second period: 95,89,82,81,72,69,100,97,75,91,82,79,96,81,80,95,89,97,83,71 Mark is a student in the first period class. His score on the exam was 95%. Zoe is a student in the second period

163. ## physics HELPP!!!!!!!

Two astronaut, as shown in the figure, each having a mass of 88.0 kg, are connected by a 10.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 6.00 m/s. By pulling on the rope,

164. ## world history

Why did different regions in Africa develop in different ways between 1000 and 1700?

165. ## Intro to Physics

(a) An ideal gas occupies a volume of 3.0 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. _____________molecules (b) If the pressure of the 3.0-cm3 volume is reduced to 2.4 × 10−11 Pa (an extremely good

166. ## physics

An object is located 16.8 cm in front of a convex mirror, the image being 11.5 cm behind the mirror. A second object, twice as tall as the first one, is placed in front of the mirror, but at a different location. The image of this second object has the

167. ## Physics

A bolt requires 15 Nm or torque to loosen it. How much force needs to be applied to a 20 cm long wrench to loosen the bolt? Assume the force is applied perpendicular to the handle of the wrench.

168. ## Physics

A golf club strikes a 0.061-kg golf ball in order to launch it from the tee. For simplicity, assume that the average net force applied to the ball acts parallel to the ball’s motion, has a magnitude of 7760 N, and is in contact with the ball for a

169. ## Chemistry Help

Write a balanced equation for the reaction between an aqueous solution of calcium nitrate being mixed with an aqueous solution of sodium phosphate Identify the precipitate.

170. ## MSU

Shirts Unlimited operates a chain of shirt stores that carry many styles of shirts that are all sold at the same price. To encourage sales personnel to be aggressive in their sales efforts, the company pays a substantial sales commission on each shirt

171. ## Calculus

One ship is 20 miles due North of another ship, and is sailing South at the rate of 10 miles per hour. The second ship sails West at the rate of 20 miles per hour. For how long will the ships continue to approach each other?

172. ## Physics Word Problem

using Snell's Law (sin(theta1)/sin(theta2) = v1/v2 where (theta1) is the angle of incidence and (theta2) is the angle of refration. The number V1/V2 is called the index of refraction. The index of refraction from air to water is 4/3. If a ray of light

173. ## Chemisty 20

A sample of water was known to contain chloride ions. To determine the concentration of chloride ions in the water sample, a student added a solution of silver nitrate to 500mL of the water. 1.26g of silver chloride percipitate formed. What was the

174. ## math

Paul is making loaves of raisin bread to sell at a fundraising event. The recipe calls for 1/3 cup of raisins for each loaf, and Paul has 3 1/4 cups of raisins a) How many loaves can Paul make? b) How many cups of raisins will he have left over? Go step by

175. ## Punctuation

He rode his bike to Bellevue, Washington in less than two hours. Is this correctly punctuated?

176. ## PHYSICS

One mole of oxygen gas is at a pressure of 5.25 atm and a temperature of 29.5°C. (a) If the gas is heated at constant volume until the pressure triples, what is the final temperature? ____°C (b) If the gas is heated so that both the pressure and volume

177. ## physics

Consider an old-fashion bicycle with a small wheel of radius 0.15 m and a large wheel of radius 0.8 m. Suppose the rider starts at rest, accelerates with a constant acceleration for 2 minutes to a velocity of magnitude 12 m/s. He maintains this velocity

178. ## Stats

I have a test on this tomorrow and I swear he didn't teach this and the book's not helping either, so maybe u can: A hwy engineer knows that his crew can lay 5 miles of hwy on a clear day, 2 miles on a rainy day, and only 1 mile on a snowy day. Suppose

179. ## English

Posted by John on Wednesday, March 19, 2008 at 3:08pm. 1. He is average height. 2. He is medium height. Are both grammatical? •English expression - Writeacher, Wednesday, March 19, 2008 at 3:21pm He is of average height. He is medium in height.

180. ## math

if john received an A on three of the last four math quizzes. what is the ratio.

181. ## chem

A solution is prepared by dissolving 25 grams of sodium sulfate in enough water to give a total volume of 500. mL. The molar mass of sodium sulfate is 142 grams per mole. What is the molarity of the solution?

182. ## Science

Use the terms atom and element to explain what makes silver and gold different

183. ## Physics

A shell is fired from the ground with an initial speed of 1.72 103 m/s at an initial angle of 40° to the horizontal. a) Neglecting air resistance find the horizontal range b) Find the amount of time the shell is in motion

184. ## Chemistry

When 5.00 g of NaOH(s) are added to 100 g of water using a calorimeter, the temperature rises from 25.0 to 37.5 °C. Calculate the molar heat of solution. NaOH(s)--->Na(aq)+OH(aq) Assume that the specific heat capacity of water is 4.18 J/gK and that of the

185. ## Physics Word Problem

using Snell's Law (sin(theta1)/sin(theta2) = v1/v2 where (theta1) is the angle of incidence and (theta2) is the angle of refration. The number V1/V2 is called the index of refraction. The index of refraction from air to water is 4/3. If a ray of light

Two speakers, A and B, are emitting identical, synchronized (in-phase) sound waves at 240kHz. A person standing a point C hears a relatively loud sound. She then starts walking towards point D, and notices the sound gets quieter, reaching a minimum when

187. ## Punctuation

Choose the correctly punctuated sentence: A) Her mother described her as a self-centered inconsiderate person. B) Her mother described her as a self-centered, inconsiderate person. C) Her mother described her, as a self-centered, inconsiderate person. I

188. ## Math

The largest multi-story building built by the Anasazi Indians called the Pueblo Bonito. The shape of its foundation is nearly parabolic, with a base (at the top of the photo) of about 500 feet and a height of about 300 feet. 1. Sketch the multistory

189. ## Pre-Calculus

The angle θ is in the second quadrant and tan θ = -3/5. Point P is on the terminal arm of angle θ/ Which is a possible coordinate for P? A) (-5,√29) B) (-3,√29) C) (-10,6) D) (-6,10) I drew the triangle, and aren't the coordinates supposed to be

190. ## physics, help urgent!

charge Q = +4.5 ƒÝC is located at the origin and is fixed so that it cannot move. A small object with mass m = 2.0 g and charge q = +8.0 ƒÝC is released from rest at point A on the x-axis at x = 2.0 cm. The small object moves without friction along the

191. ## maths

using the digits 1,3 and 5 only once write the greatest and least three-digit numbers you can

192. ## Statistics

When testing H0: σ12 = σ22 vs. Ha: σ12 ≠ σ22 two random samples of sizes 10 and 8, respectively, are used. The calculated value of the test statistic is found to be equal to 2.22. Which of the following statements is true? a. H0 must be rejected at

193. ## subject verb agreement

which verb is correct. 1.Historical fiction (is, are) make-belive stories based on real events or people. 2. An example of historical fiction (is, are) the novel Ben and Me. 3. The main characters (is, are) Bem Franklin and a mouse named Amos.

194. ## math

given the digits 0,1,2,3,4,5,6, and 7 find the number of possibilities in each category four digit numbers, odd three digit numbers and three digit numbers without repeating digits.

195. ## physics

a nasty little boy tries to drop a water balloon from the top of a 20 m tall building so it lands next to and splashes an innocent woman standing on the ground below. how long does the woman have to get out of the way?

196. ## algebra

3. Find a model for the set of values. x –5 –4 0 4 5 y 25 16 2 16 25 Can someone explain what the graph might look like whether it opens up or down, or slanted line or squiggle line

197. ## Physics

An arrow is shot at an angle such that it's horizontal velocity is 40 m/s and it's vertical velocity is 20 m/s. Find the horizontal distance the arrow will travel before hitting the ground

198. ## Math

Find the linear speed in feet per minute of a seat on the Ferris wheel. v= r.w How do I find out "w"? r= 25 ft. arc= 40 ft. angle= 58° 1 revolution= 157 ft./revolution

199. ## History

Why might a president's legislative proposal receive strong public support from around the nation yet still encounter opposition in Congress?

200. ## Algebra 1

Christopher orders a 3 topping pizza for \$15.25 and a 5 topping pizza for \$17.75. Write and solve a system of linear equations to find the price of a plain pizza( no toppings) and the cost of each topping.

201. ## physics

a college student takes her book to class by placing them in a box and pulling it around school. She pulls on the box with a force of 90N at a angle of 30 relative to the horizontal. the box of books has a mass of 20 kg and the coefficiant of kinetic

202. ## Grammar

An adjective cannot tell which one, what kind, or how many. A) True B) False Answer B The predicate is the thing or person a sentence is about, and the subject tells something about the predicate. A) True B) False Answer A

203. ## science

what is a form of energy that is always transferred from a warmer substance to a cooler one?

204. ## algebra

In ten years a child will be 3 years older than twice her current age. What is the current age of the child

205. ## Physics

If each tire of an automobile has an area of .026 square meter in contact with the ground, the weight of the automobile is 26,000 N, what is the pressure in the tires? Please show work.

206. ## physics HELPP!!!!!!!

A 6.00 kg mass is connected by a light cord to a 1.00 kg mass on a smooth surface as shown in the figure. The pulley rotates about a frictionless axle and has a moment of inertia of 0.400 k∙m2 and a radius of 0.700 m. Assuming that the cord does not slip

207. ## Physics

A uniform 2.20 kg sign of height 0.600 m hangs freely from a frictionless pivot. (Its extension into the page is irrelevant: treat it as a thin uniform rod of ‘length’ 0.600 m, pivoted about one end.) You throw a point-like 0.248 kg snowball at the

Assume that X is a binomial random variable with n = 5 and p = 0.35. Calculate the following probabilities?

209. ## Grammar

Prepositions show a spacial, time, or logical relationship between the subject of the preposition and the rest of the sentence. A) True B) False AnswASer B

The following proportion could be used to change from feet to which measure. 1/12 = 2/x customary length: 1 mile=1760 yards 1 mile=1285280 feet 1 yard=3 feet 1 foot=12 inches A. ounces B. pints C. quarts D. gallons

211. ## Physics

A uniform 5.32 kg solid sphere of radius 0.344 m that is free to roll on a horizontal surface has a light axle passing through its diameter as shown. The axle is connected to a like yoke and in turn a light rope as shown. A constant tension of 7.81 N is

212. ## English

1. He is riding a horse. 2. He is riding on a horse. 3. He has to ride a taxi. 4. He has to ride on a taxi. 5. He has to ride in a taxi. 6. He will ride a bus. 7. He will ride on a bus. 8. He will ride in a bus. 9. He will ride the subway. 10. He will ride

213. ## Physics

Water (η = 1.00E-3 Pa*s) is flowing through a horizontal pipe with a volume flow rate of 0.0120 m3/s. As the figure below shows, there are two vertical tubes that project from the pipe. Assume that H = 0.0421 m and L = 0.706 m. Calculate the radius of the

214. ## physics

Runner A is running at a constant rate of 2.3 m/s when he passes RUmmer B who is stationary. Runner A continues running at a constant pace, and Runner B begins to run 4 seconds after Runner A just passes him. If Runner B is accelerating at a rate of .5

215. ## Punctuation

Is this punctuated correctly? The skin was prepped with Betadine, the wound closed in layers, and Steri-Strips applied.

216. ## math

a mystery number is bigger than 50 and larger than 100. you can make exactly five different rectangles with the mystery number of tiles. its prime factorization consists of only one prime number. what is the number

217. ## English

i doing a compare/contrast essay on character h olden frm novel i read and hamlet. for my thematic statement, do i just talk about one theme or like a mixture of things they've gone through? also what i name this essay? something that fit both characters?

218. ## PHYSICS

15.0 moles of an ideal gas, at an initial pressure of 3.50 x105 N/m2 and an initial volume of 1.200 m3, undergo a small isothermal expansion to a volume of 1.220 m3. Find the work done by the gas.

219. ## physics

The equation of motion for an oscillator is given by y= (0.200cm)sin (140t). What are the 1)alplitude, 2)period, and 3) frequency of this motion?

220. ## Chemistry

balloon is filled with 1.35 atm dimethyl ether gas and 5.25 atm of oxygen gas at 27 C degrees. They react: C2H6O (g) + 3O2 (g) --> 2CO2 (g) + 3H2O(g) The system is allowed to cool back down to 27 degrees Celsius following the reaction. assuming external

221. ## Statistics

When estimating a population mean μ, where the population standard deviation σ is known, we can: a. choose a larger z value, construct a wider confidence interval, and achieve a lower confidence level b. choose a smaller z value, construct a narrower

222. ## Math

Find the point on the line 1x+7y-4=0 which is closest to the point (-4,-6)

223. ## Chemistry

A solution has a %T value of 75.4% at 600 nm. What is the absorbance of this solution at this wavelength?

224. ## Science

If a dog chases a cat and the cat ran faster up a flight of stairs, can you conclude that the cat has more power.

225. ## Math

Help!!! On a blue print scale 1/2 inch = 10 feet. How do I figure out the actual width of the living room whose distance is 3/4 inches

226. ## Chemistry

You are asked to prepare a temperature bath that freezes at -25 degrees C, using only water and ammonium sulfate. a. How many grams of ammonium sulfate would you need to prepare this bath if you start with 500 grams of water? b. What would the boiling

227. ## statistics

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the

228. ## english

1. He is of average height. 2. He is around average height. 3. He is a little below average height. 4. He is over average height. 5. He is of much more average height. 6. he is a little average in height. 7. He is more average in height. (Are they all

229. ## Chem help asap

A 890 mL NaCl solution is diluted to a volume of 1.15 and a concentration of 8.00 . What was the initial concentration? How do I go about this? M1V1=M2V2? and if it is how do I replace the variables?

230. ## Chemistry

What mass of oxygen is required to burn completely 1.oo L of a mixture that is 90 % gasoline(d= 0.782 g/mL) and 10% ethanol (d=0.789 g/mL)by volume?

231. ## chemistry

How many molesof NaOH are present in 17.0ml of 0.250M NaOH

232. ## statistics

Which of the following defines the probability of an event A, or P(A)? The probability of A equals 0.50. The probability of A equals the number of possible outcomes in the sample space divided by the number of outcomes favorable to A. The probability of A

233. ## statistics

If you roll a fair die 100 times and 35 of the rolls result in a six, what would be the probability of the outcome of a 2, P(2)? P(2) = 0.02 P(2) = 2 P(2) = 35 P(2) = 0.35

234. ## Physics

In a quality control test a steel ball with mass M falls a distance of H and bounces off a steel plate and through a hole in the wall into the ok bucket. If the ball bounces up a distance of 9/10H after hitting that plate and has a velocity of Vo at point

235. ## math

the sum of two numbers is 42. their product is 185. what are the two numbers?

236. ## Physics

Two identical objects are in the same surroundings at 4.50oC. One is at a temperature of 1400 K, and the other is at 1040 K. Find the ratio of the net power emitted by the hotter object to the net power emitted by the cooler object.

237. ## English

Average Sized Paragraph on Cal Hockley (Titanic)? Could you include some of these? Who are they (Background) What they look like There personality Relationships with other characters How others feel about him You could discuss the film techniques James

238. ## math 1

Pls solve this using one variable: The difference bet 2 numbers is 3. The sum of thrice the smaller and the larger is 35. Find the original number.

239. ## math

what two simpler problems can you use to find 9x38

240. ## edmondson

In which of the following ways do the Montessori organizations differ from the other accrediting groups you learned about in your study unit?

241. ## childcare

In which of the following ways do the Montessori organizations differ from the other accrediting groups you learned about in your study unit?

242. ## physics

a college student takes her book to class by placing them in a box and pulling it around school. She pulls on the box with a force of 90N at a angle of 30 relative to the horizontal. the box of books has a mass of 20 kg and the coefficiant of kinetic

243. ## math

Thom measures the length of his skateboard in millimeters and in centimeters. will there be more millimeters or centimeters. explain?

244. ## math

in words explain how to simplify,ratios,and common denomerators.use each metod to comper 3/4 and 9/12.explain the proses in words. im desperet my homework is due fraiday november 16,2012.

245. ## college algebra

q(x)=3x^2-11x-4/5x^2-16x-16 what are the oblique horizontal vertical asyptote

246. ## biomechanics

A subject with a height of 165cm and mass of 69 kg is sitting with his lower limb positioned with hip in 90 degree of flexion and knee in full extension and foot in 90 degree of dorsiflexion a) calculate the inter-segment force at the knee joint

247. ## geometry

Write a flowchart proof: given BD bisects

248. ## Grammar

Essential clauses should be set off with commas. A) True B) False My answer is B

249. ## physics

A red ball is thrown up off the edge of a building 10 m tall with an initial speed of 4 m/s. A) how long does it take for the red ball to strike the ground below? B) If a black ball is dropped off the edge of the same building, how many seconds after the

250. ## college algebra

F(X)= -3x^2 -30x-70 what is the vertex what is the axsis of symmetry what are the intercept what is the domain what is the range intervals increase intervals decrease

251. ## Statistics

The populaion mean annual salary of service desk managers is \$48,000 with a standard deviation of \$1,800. A sample of 36 service desk managers is randomly selected. What is the probability the mean annual salary of the sample is less then \$47,550?

252. ## physics

It has been suggested that rotating cylinders about 12 mi long and 4.1 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall

253. ## math

Which of these expressions is equivalent to 11(10 – 8p)? A 880p . B 110 – 88p . C 110 – 8p . D 22p . E 2p

254. ## physics

michael starts at x=3 m and travels to the right at a constant 6 m/s for 2 s. he then slows down at a constant rate, coming to rest at 4 s after beginning to slow. A) what is michael's position when t=4 s.? C) What is Michael's velocity when t=4 s? d) What

255. ## physics

The equation of motion for an oscillator is given by y= (0.200cm)sin (140t). What are the 1)amplitude 2)period, and 3)frequency of this motion?

256. ## statistics

Fruit flies which were heterozygous for both autosomal dominant traits aristapedia (Ar) and star eyes (S) were mated. Since aristapedia and star eyes are both lethal when homozygous and unlinked, one would predict ratio of 4:2:2:1 for Ar-S to Ar to S to

257. ## Grammar

Choose the correctly punctuated sentence: A) Taylor will sell the tickets for the ball game and Danielle will assist her. B) Taylor will sell the tickets for the ball game, and Danielle will assist her. C) Taylor will sell the tickets for the ball game,

258. ## number problem

The units digit of a 2 digit number exceeds thrice the tens digit by 1. The sum of the digits is 9. Find the number.

259. ## math

number sense- What two simpler problems can you use to find 9 x 38?

260. ## Finance

Seven years ago a semi-annual coupon bond with a 10% coupon rate, \$1,000 face value and 15 years to maturity was issued by Corn Inc.. Teddy bought this bond two years ago when the market interest rate was 12%. And now the market interest rate is 5%. If

261. ## seience

a cell is to tissue as a ____is to a ____because

262. ## math

do not know how to get answer on kathleen spent \$30.50 on two shirts. One shirt cost \$3.50 more than the other. How much did each shirt cost?How do you get the answer for X +X+3.50 = 30.50. Trying to explain how to get answer to a 5th grader.

How can the graph of g(x)=3square root x+3 be obtained from the graph of g(x)= 3 square root x? A. shift the graph 3 units right b. shift the graph 3 units up c. shift the graph 3 units down d. shift the graph 3 units left I am having problems with the

264. ## math

In the Finn family each girl has the same number of brothers as sisters. Each boy has twice as many sisters as brothers. How many children are in the family?

265. ## problem solving

a pound of aluminum may be used to make 29 aluminum cans. there are 240 pounds of aluminum in a 3,000 pound car. how many aluminum cans could be made from the aluminum in a,3,000 pound car? please help solve the problem.

266. ## statistics

Settlement of two species of mussel larvae was studied. In a wave exposed location, a collector pad yielded 108 larvae of Mytilus trossulus and 72 of M. californianus. In a wave sheltered location, a collector pad yielded 54 larvae of M. trossulus and 16

267. ## chemistry

(a) Calculate the molar mass of the unknown compound. The freezing point of benzene is 5.48°C, and the Kf of benzene is 5.12 °C/Molal. Show your work

268. ## chemistry

calculate the mass of naso4 needed to prepare of 0.5L of 0.15M of solution

269. ## Grammar

A sentence will still make sense if you leave out an essential phrase. A) True B) False I answered B

270. ## biomechanics

a)Describe the structure of the contractile elements of skeletal muscle b)Sketch a graph of the relationship between developed tension and muscle length and explain the shape of the curve in terms of the interaction between thick and thin myofilaments C)

In the Finn family each girl has the same number of brothers as sisters. Each boy has twice as many sisters as brothers. How many children are in the family?

272. ## statistics

The following data set gives FICO credit scores of a sample of 40 mortgage applicants to a local bank. (Note that the scores are in increasing order for your convenience.) 444, 497, 502, 517, 532, 559, 568, 598, 611, 636, 637, 657, 681, 681, 693, 698, 701,

which of the following best describes how the graph of f can be obtained from the graph of y=1/x^2? f(x)=14/x^2 choose the correct answer a.vertical stretch by a factor of -4 b. reflection over the y-axis, vertical shrink by a factor of 4 c. reflection

274. ## Science 8R - help

Homework - Draw a graduated cylinder with different liquids in it (different colors) and different densities. Write the densities next to the liquid. What kind of liquid???? How will I know the densities???? What's the color of the liquid???? please help

275. ## Physics

An object with a weight of 30 newtons is placed on a flat, level surface. What is the normal force that the surface pushes on the object with?

How can the graph of g(x)=3square root x+3 be obtained from the graph of g(x)= 3 square root x? A. shift the graph 3 units right b. shift the graph 3 units up c. shift the graph 3 units down d. shift the graph 3 units left I am having problems with the

277. ## Re: Plant biology

I'm doing a writing assignment on plant stress physiology. The stress that I chose to research was heat stress. One of the things that I have to do is describe at least 3 experiments that I plan to perform (hypothetically speaking, of course). At least one

278. ## Grammar

Periods are used to separate clauses. A) True B) False Answer A

279. ## Punctuation

Choose the correctly punctuated sentence: A) The weather on November 3 2010 was warm and sunny. B) The weather on November 3, 2010 was warm and sunny. C) The weather on November 3, 2010, was warm and sunny. My answer C

280. ## science

How to do a analogy of a cell compared to tissue.

281. ## analyzing poems

Spatial depths of being survive The birth to death recurrences Of feet dancing on earth of sand; Vibrations of the dance survive The sand; the sand, elect, survives The dancer. He can find no source Of magic adequate to bind The sand upon his feet, his

282. ## geometry

Rick's 76ft times 50ft house sits on a plot of land as shown in the diagram below. If 1 bag of lawn food covers 5000 ft squared , how many bags should Rick buy to cover the lawn (shaded)?

283. ## Precalculus 2

Similiarly to a question I asked previously I took the same approach. the problem is: what value(s) of theta solve the following equation? cos(theta)sin(theta) - 2 cos(theta) = 0? I let Cos theta = X and sin theta = X unfortunately I end up with something

284. ## physics

A hot rod of mass 1600 kg, starting from rest reaches a speed of 170 m/s in only 10.1 s. What is the average output power? 1. 0.226644 MW 2. 0.0013332 MW 3. 2.28911 MW 4. 4.57822 MW 5. 0.0269307 MW

285. ## Writing

I am doing a journal review paper for Psychology. What are the implications of this work (i.e. what light does it shed on the particular topic related to psychology)? I do not understand the question. What is it asking me to do? Can someone explain the

286. ## Science 8R - help!!!!!!!!!!!!!!!!! (anyone????)

Homework - Draw a graduated cylinder with different liquids in it (different colors) and different densities. Write the densities next to the liquid. What kind of liquid???? How will I know the densities???? What's the color of the liquid???? please help

287. ## Physics

A 50.0 Kg ball rolling at 10.0 m/s eastward (on a frictionless surface) collides with a 20.0 Kg ball rolling westward at 20.0 m/s. After the collision the two balls stick together (coalesce). What is the momentum after the collision?

288. ## english

Is this sentence correct? A sheet lied on the rug to catch paint splatters.

289. ## math 1

The average of 10 numbers is 12. If one number is removed, the average is 11. What number is removed?

290. ## Math

Evalute each exxpression. write each answer in simplest form. 12b for b=7/12

asked by Mother Trying to help son
291. ## Science

Intensity of the HeNe laser (lambda = 632nm) was measured at 2 distances: 1m and 200m from the laser. The meter reading was 10W and 1W correspondingly. How many photons/sec will enter your eye if you look into the laser from 1m? From 2m? Assume that radius

292. ## English

1. I have to go to my English academy to learn English from a native speaker. 2. I have to have a group chatting on the smart phone with my close friends. 3. I have to play computer games on-line. 4. I have to complete my social studies homework with

293. ## statistics

what is the probability of winning a lottery with 8 numbers drawn from 52 numbers (assume you buy 1 ticket)?

294. ## Writing-Introduction

Usually when you write an introduction, after you finish, do you indent or skip a line to start a new paragraph for the body.

295. ## maths

After one year ,a writer had to pay \$589 in interest on a \$6,200 loan.what is the interest rate?

296. ## math

ok so this question is to ms. sue this question says what is the actual height of the living room whose distance is 9/20 inch on the the blue prints??? can u help me please -celeste

297. ## biomechanics

Briefly describe the distribution problem and the two techniques used to overcome it.

298. ## algebra

find a quadratic equation with roots -1+4i and -1-4i If someone could explain it would help me understand

299. ## Science

What is the scientific name of tiger

300. ## Chemistry

If pH = 6.6, calculate the molar concentration of H^ + (aq) in the solution.

301. ## Grammar

A number of small bruises __________ present upon examination. A) was B) were I say it's B, but it could also A because they both work.

302. ## English

Are there any words that end with "ale" or "ail" that is a place?

303. ## college algebra

use completeing the square to describe the graph of f(x)=4-16x-x^2 support your answers graphically

304. ## math

do not know how to get answer on kathleen spent \$30.50 on two shirts. One shirt cost \$3.50 more than the other. How much did each shirt cost?How do you get the answer for X +X+3.50 = 30.50. Trying to explain how to get answer to a 5th grader.

305. ## Grammar

Pronouns are used to make sentences shorter, less redundant, and less confusing. A) True B) False I answered A A common noun is capitalized, and a proper noun is not. A) True B) False Answer B

306. ## math

a man bought a number of items at a bakery totalling \$10.20 ,if the sales tax was \$0.51 what is the tax rate?

307. ## math

if only digits 0,1,2,3,4,5,6, and 7 may be used find number of possibilites four digit numbers

308. ## Grammar

A person as young as _________ should not have problems with ovarian cysts. A) her B) herself C) she I answered B but feel it could be A

309. ## college algebra

determine the quadratic function of f whose graph is the vertex of (1,-4) and the y-intercept is -3.

310. ## Thanksgiving Writing-Introduction

I need help on writing an INTRODUCTION from a turkey's perspective why pilgrims shouldn't eat turkey for Thankgiving feast.

311. ## Science

Does boron react with anything?

312. ## calculus

okay i need to find the derivative of f(x)=cosπ(x^2) and if you could show steps it would be GREATLY appreciated. thank you so much!

313. ## math

Write four million, four thousand, forty in standard form.

314. ## Art

Early books were illustrated using this technique.

315. ## Grammar

Choose the correctly punctuated sentence: A) Upon hearing the Huskies were playing the Ducks she immediately bought tickets. B) Upon hearing the Huskies, were playing the Ducks she immediately bought tickets. C) Upon hearing the Huskies were playing the

316. ## math

THE POPULATION OF LINGO IS PARTY ENGLISH AND PARTLY FRENCH.IF 80% SPEAK ENGLISH AND 70%SPEAK FRENCH.WHAT % SPEAK BOTH LANGUAGE?

317. ## Grammar

Choose the correctly punctuated sentence: A) I understand Anne that you really don’t care about hurting my feelings. B) I understand, Anne, that you really don’t care about hurting my feelings. C) I understand, Anne that you really don’t care about

318. ## Math

Is a bar graph better than a pictograph to display data? Explain.

319. ## English

1. Plants grow in earth. 2. Plants grow on earth. 3. Plants grow in the earth. 4. Plants grow on the earth. (Which ones are correct? What does #1 mean? Does #i mean that plants grows under the earth?)

320. ## Physics

An arrow is shot at an angle such that it's horizontal velocity is 40 m/s and it's vertical velocity is 20 m/s. Find the horizontal distance the arrow will travel before hitting the ground.

321. ## College Algebra

I am using Hawkes Learning System (8.7 Nonlinear Systems of Equations)and my problem is x^2+y^2=13 and y+7=x^2. The answers I came up with are 2 square root of 3 and 3 for my x's. And I received (5,-4) as the y-coordinates. Is this correct?

322. ## Grammar

Choose the correctly punctuated sentence: A) My birth mother, Mrs. Mom, was a great cook. B) My birth mother Mrs. Mom was a great cook. C) My birth mother, Mrs. Mom was a great cook. I answered C

323. ## Math

How do I find the measurement of side CDin the quadrilateral WVUT if the midpoints are F,E,D,C and WU =45 in. and TV = 31 in.?

324. ## math

What numberis 60% of 35?

325. ## physics

The radius of curvature of a convex mirror is 1.60 x 102 cm. An object that is 11.0 cm high is placed 40.0 cm in front of this mirror. Determine (a) the location and (b) the height of the image.

326. ## ersonal Dimensions of Education

True or False... As a general rule, collective nouns- such as family, class, faculty, audience- take singular verbs. For example: This year the graduating class is having a beach party after the ceremony.

327. ## Grammar

A sentence fragment can only be caused by a missing subject. A) True B) False My answer is B

Homework - Draw a picture of an atom is there any pictures of an atom I can easily draw, please help

On a balance scale 5 books on one side of the scale balance with 3 books and half a pound weight on the other side. All of the books weigh the same amount. How much does each book weigh.

330. ## Physical scince

What are the equations for potential and kinetic energy?

the graph of y=1/3 3square root x+5 can be obtained from the graph of y=3square root x by which transformations? Horiztonal shift: a. 5 units to the left b. 3 units to the right c. 3 units to the left d. 5 units to the right By what factor of y=3 square

332. ## social studies

Squanto was poisoned by the Wampanoag, some people believed at that time. On the way back home from the Wampanoag he became sick and got a fever. He bleeded from his nose and he died. (What does 'poisoned' mean here? Did he drink a poisoned beverage? Or

333. ## Grammar

Choose the correct sentence A) Patient reports drinking socially, smoking daily, and occasional drug use. B) Patient reports drinking socially, smoking daily, and he uses no drugs. C) Patient reports drinking socially, smoking daily, and using no drugs. I

334. ## IT 235

Post your response to the following questions: For which types of image creations might it be beneficial or necessary to add text? Which text effects do you like to use? How will your final project include text?

335. ## sci

The degree of intense A. Intensity B. Measurement C. Potential Energy D. Electricity I say B

336. ## Art

How can I describe a ceramics art piece? Is there certain words i should use?

337. ## geometry

Prove that if the area of a rectangular patio abcd is 25sq units and one lengths is 5 units then abcd is a square

338. ## statistics

Settlement of two species of mussel larvae was studied. In a wave exposed location, a collector pad yielded 108 larvae of Mytilus trossulus and 72 of M. californianus. In a wave sheltered location, a collector pad yielded 54 larvae of M. trossulus and 16

339. ## Trigonometry

What value(s) of theta solve the following equation? cos^2(theta)-cos(theta)-6=0? I try plugging in different numbers but I am not sure exactly what I am looking for in order to solve?

340. ## Triangles

solve any triangles satisfying alpha = 20 degrees b = 10 c = 16 b and c are 2 side values and if I use the pythagorean theorem and I get 18.18? Did I do this right?

341. ## science

A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s. If the cart has a beginning speed of 2.0 m/s, what is its speed?

342. ## MATH

HOW MANY MULTIPLES OF 11 ARE THERE BETWEEN 200 AND 500?

343. ## biomechanics

calculate the following body segment parameters for the thigh of a subject with a height of 180cm and mass of 72kg a) segment mass b) segment length c) centre of mass position relative to proximal end d) radius of gyration about proximal end e) Moment of

344. ## math

please explain how to use hundreds chart to answer this queston;WHAT % OF THE NUMBERS ARE MULTIPLES OF BOTH 2 AND 3? i have no idea how to work it out, thanks

345. ## Math

Theater has 108 seats, which are arranged in rows. The number of seats in each row is 3 less than the number of rows. How many rows of seats are in the theater.

346. ## math

if my input numbers are 1,2,3,4,5,6 and my output numbers are 8, 14, ?, 24,28,?...I cannot figure out the rule and the numbers where the question marks should be.

347. ## Statisitcs

The mean height of fully grown birch trees are 18 feet with a standard deviation of 1.2 feet, normally distributed. Random samples of size 9 are drawn from this population and the mean of each sample is determined. Find that mean and the standard error of

348. ## Punctuation

Is this punctuated correctly? Martin Smith, CPA, MBA, is my accountant.

349. ## Physics

A 3 kg ball is traveling in a circle of radius 2 meters with a tangential velocity of 2 meters/second. Find the centripetal acceleration of the ball and the centripetal force acting on it.

350. ## Fractions

Solve by drawing a diagram. A Tour bus travels 7 1/2 mi south, 3 1/2 east, 4 1/3 mi north, and 11 1/2 mi west. How far has the tour bus traveled when it crosses its own path?

351. ## Physics

A baseball is thrown such that it is in the air for 4 seconds and lands 100 m away. Find the initial vertical and horizontal components of the baseball's velocity.

352. ## Punctuation

Are these punctuated correctly? 1.Depression is often a genetic disorder, but it can be safely treated with medication. 2.Learn the difference between an animal, a vegetable, and a mineral.

How can the graph of g(x)=3square root x+3 be obtained from the graph of g(x)= 3 square root x? A. shift the graph 3 units right b. shift the graph 3 units up c. shift the graph 3 units down d. shift the graph 3 units left I am having problems with the

In the Finn family each girl has the same number of brothers as sisters. Each boy has twice as many sisters as brothers. How many children are in the family?

355. ## Personal Dimensions of Education

The subject and verb should agree even when other words come between them. For example: The students as well as their teacher, are excited about the upcoming trip to Italy. Is it True or False

356. ## math

a mystery number is bigger than 50 and larger than 100. you can make exactly five different rectangles with the mystery number of tiles. its prime factorization consists of only one prime number. what is the number

357. ## Science

How can knowing about the chemical properties of different elements help a society become more sustainable?

a preferred stock paying 9.7% on \$125 par value equals what? move decimal two places to right. thank you

359. ## Chemistry Help

If you mixed 10.0 mL of calcium nitrate and sodium phosphate, both 0.250M,which of the two would be the limiting reactant?

360. ## Grammar

The patient's husband is older than __________. A) her B) she I answered B

361. ## physics

jess = 65kg, mary 55kg. Jess on trapeze together after pick up 5.5ms-1. calculate the verticle height of the drop after jess picks of hanna.

362. ## books

in the book it happened to nancy what cost her \$6 and what important decision doed she have to make?

asked by it happened to nancy
363. ## math equation

A chef is preparing a recipe for an upcoming banquet. Normally, he uses 10.25 mL of water, but today, he is using 112.75 mL of water. By how many times did the chef need to increase the recipe? Is this right?? i = variableE Equations 10.25i / 10.25 =

364. ## Science

Why are pi and pi* (anti-pi) transitions on conjugated double bonds such good absorbers of visible light?

Help!!! If a den has 0.5 by 0.6 dimentions , what will be the dimensions after the house is built; 1/2 in = 10 ft Can any one help me figure this out???? Thanks!!

366. ## English Thesis Statement

Critique my thesis please? Sartre uses the ideas he lays out in “Self-Deception” in his short story “The Wall” to establish the connection between bad faith and living toward death, and to reject the Freudian notion of the unconscious in favor of

367. ## college algebra

determine the quadratic function f whose vertex is (2,-4) and passes through (3,-1) f(x)= what? type answer in form of f(x)=ax^2+bx-c

368. ## chemistry

what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?

369. ## Art

This was the purpose of a missal.

370. ## Psychology

I am doing a journal review paper. What are the implications of this work (i.e. what light does it shed on the particular topic related to psychology)? I do not understand the question. What is it asking me to do?

371. ## MATH

A 3 CM CUBE IS PAINTED ON ALL ITS FACES.IT IS THE CUT INTO 1 CM CUBES .HOW MANY CUBES WILL HAVE PAINT ON EXACTLY FACES?

372. ## prime factorization

how do i find the prime factorization for 42???

373. ## Grammar

With plans for a large family party to celebrate his coming retirement.” is a A) Fragment B) Sentence I answered A

374. ## Grammar

Between the mother and __________, there was already a long history of addiction problems. A) he B) him C) himself I answered B

375. ## Grammar

“After a very painful examination.” is a A) Fragment B) Sentence

376. ## physics

a man drives with an average speed of 25 mph for 20 minutes. he rests at his destination for 1 hour and then returns home with an average speed for this leg of the trip of 15 mph A) what is his average speed for the round trip B) What is his average

377. ## Grammar

A preposition links a noun or verb to other words in a sentence. A) True B) False I answered B

378. ## maths

if the number of daily customers served by a restaurant increased from 160 to 208,what was the percent increase?

379. ## Science and Math Combined

Can someone please help me understand how I figure out how much electricity I used when using a small appliance (lets say 300 watts. For the duration of 3 hours? Does anyone know the formula to figure this out?

380. ## Math

What is the inverse equation of f(x)=(x+2)/(x-1)?

381. ## Grammar

Although the medication was __________, she claimed to have never actually taken any. A) hers B) her's I answered A

382. ## math

jessica made 8/3 pounds of fudge. she gives 3/4 pound of fudge to will. how many pounds or how much of a pound of fudge does she have left?

383. ## math

I am trying to figure out an input/output problem: Input Output 1 8 2 14 3 - - 24 - 28 6 -

384. ## Calculus 2

Find the limit as x approaches infinity of (1-(1/(2x)))^(2x).

385. ## math

What is the sum of a 22–term arithmetic sequence where the first term is 56 and the last term is –28

386. ## Math

Solve the equation: 125^r=5

387. ## algebra 2

Passes through (1, 1) and perpendicular to y= -1/2x +4.

388. ## math

Which of the following is NOT equivalent to 4 × 23c? A c × 23 × 4 . B 4 × c × 23 . C 23c × 4 . D 23 × 4 × c . E 27 × c

389. ## math

the sum of two numbers is 42 their prodcut is 185 what are the two numbers. Need to know how to get the answers for a 5th grader

390. ## Grammar

Mother wondered from __________ her children had gotten the head lice. A) who B) whom I answered b

391. ## Grammar

Choose the correct sentence A) The patient is a 13-year-old female weighing 100 pounds who has a sprained wrist. B) The patient is a 13-year-old female with a sprained wrist weighing 100 pounds. I answered A

392. ## Biology

How do connective tissue cells differ from nerve cells

393. ## physics lab

For an unknown sample of the experiment, students measure 1602 counts when they first receive their sample and 1317 counts 3.5 minutes later. Calculate the half-life t12 of their sample.

394. ## chemistry

what is a positron

395. ## english

sue, my neighbor usually plants her flowers in april.

396. ## Science

Chl has an absorbance peak at 435nm (Soret band) and a peak at 665nm (Qytransition). Calculate the energy gap (in Joules) between the ground and excited states of these two transitions.

397. ## English

Classify the sentence: "Stand quietly in front of the camera." We know it is an imperative sentence, but what is "front" and "of"?

398. ## Art

This machine changed the way early books were made.

399. ## MATH

N = 0.03X - 58.59

400. ## science

if a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? formula

401. ## science

if a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? formula

402. ## Physics

A 3 kg ball is traveling in a circle of radius 2 meters with a tangential velocity of 2 meters/second. Find the centripetal acceleration of the ball and the centripetal force acting on it.

403. ## Chemistry

How much copper is in 4.722 mol of copper(II) chloride? Answer in units of g What should I do?

404. ## ss

how did kites affect people, cultures and economies

405. ## Grammar

A prepositional phrase always starts with the preposition. A) True B) False I answered A

406. ## computers lies or truth VEY URGENT

I saw a website that said the world will end in 2015. Is this true or not? I'm getting really really scared.

407. ## problem solving

there are 118 ridges around the edge of a dime. key has \$5 in dimes. how many ridges,are there in all of kellys dimes combined? please solve. thanks

408. ## chemistry

when Na compounds are heated, thy give off a light of 5890 A. If 1 x 10-4 mole of Na atoms each give off a photon of this wavelength, how many kilojoules of energy are given off?

409. ## busness

which of the followig should you not do in the close of an interview give final explanation for a weknes that you have

410. ## math question

jane bought two shirts for \$30.50 and she paid \$3.50 more for one how much did each cost

Y^2-y-6

412. ## Math URGENT!

the roots of a tree are 1/8 of the tree. they are 0.87 m. how tall is the tree? my answer: 0.87 x 7 = 6.09 m please check if my answer is right thanks :)

413. ## Conjecture

what conjecture could be made and proven from the following? sin(3x)/sin(x) - cos(3x)/cos(x) I put it on my calculator and based on the graph I say that as it crosses the y axis the values get larger.

415. ## Pre-Calculus

Same problem with this question The angle θ is in the fourth quadrant, and tan θ = -3/7. Point P is on the terminal arm of angle θ. Which is a possible coordinate for P? A) -21,9 B) 9,-21 C) -9,21 D) 21,-9

416. ## math

in words explain how to simplify,ratios,and common denomerators.use each metod to comper 3/4 and 9/12.explain the proses in words. im desperet my homework is due fraiday november 16,2012.

417. ## Math

G(x)=2x+5 G'(x)=2 there is no critical number

418. ## Math

whay is the critical number of the !@#\$%^&tion G(x)=2x+5

419. ## english

assign each word a part of speech A mistake at a pharmacy sent to the hospital.

420. ## chemistry

what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?

421. ## cllege algebra

determine the qudratic function whose vertex is (2,-4) and passes through (3,-1) fx=

422. ## Geometry

y-8= 4/3 x(x+4)

423. ## college algebra

find the intercept of the equation (x+6)^2(x-1)^2 does this crosses the x axis the smaller or touches the x axis or does it touch at the larger x intercept or crosses the larger

-6+5x=8x-9

425. ## Grammar

The patient and __________ were lifted carefully onto a stretcher. A) her B) she I answered A

426. ## MATHEMATICS

alpha +beta=pie/2 & beta+gama=alpha then tan alpha=?

427. ## MATH

HOW TO USE HUNDREDS CHART TO ANSWER THIS QUESTION;WHat % of the numbers are multiples of 3

55+x=4(7+x)

429. ## Math

What is 33 1/3 off 143.33 How do you do this??

430. ## math

1)d/dx of cos4x/3-x^2(inculding quentient&chain rule) 2)sin^2x/1+cosx(same method)

431. ## 8th Gov.

13 letter word .............a group of individuals gathered together for a purpose)

432. ## english

What is the verb (linking or action) in "Long ago, farmers milked cows by hand"

433. ## English

Find an issue with two sides.

5-3r=-37 r= ? x/8+10=13 x= ?

435. ## math

How do you write the following digit:five thousandths.Does this right,0.005

8x+6=3(4-x)

437. ## Calc 1

What is the derivative of dS=x^2+ 5488/x?...

438. ## math

4(1/2x+1/2)=2x+2

439. ## math

What is 1/2 x 5?

440. ## collge algebra

state the domain, range,the asymptotes fx =6-1/(x+5)^2