# Questions Asked onJanuary 23, 2012

1. ## Physics

Four point charges are located at the corners of a square with sides of length a . Two of the charges are +q, and two are -q. Find the magnitude of the net electric force exerted on a charge +Q, located at the center of the square, for the following

2. ## chemistry

the recommended daily allowance of calcium is 1.2 g. calcium carbonate contains 12.0 % calcium by mass. how many grams of calcium carbonate are needed to provide the rda of calcium

3. ## math

A couple intends to have four children. Assume that having a boy and girl is equally likely event. a) List sample space b) Find the probability that couple has two boys and two girls; c) Find the probability that couple has at least one boy

4. ## Physics

A hummingbird has a mass of about 1.7 g. Suppose a hummingbird does 0.15 J of work against gravity, so that it ascends straight up with a net acceleration of 1.2 m/s (squared). How far up does it move?

5. ## chemistry

Some liquids have enough attractions between molecules to form dimers. (Dimers are molecules formed from the combination of identical molecules, A + A --> A2.) What effect would this have on the experimental molar mass? This was a molar mass lab. Alcohol

6. ## math

You spend \$685 a month on living expenses. If your monthly income is \$1500, what percent of your income do you spend on living expenses?

7. ## English. Punctuation and Mechanics

Identify the sentence with the correct punctuation. a) Do you have everything - such as extra clothes; for your trip? b) Do you have everything: such as extra clothes, for your trip? c) Do you have everything - such as extra clothes, for your trip? d) Do

8. ## Chem - Titration

A 100.0-mL aliquot of 0.100 M diprotic acid H2A (pK1 = 4.00, pK2 = 8.00) was titrated with 1.00 m NaOH. Find the pH at the following volumes of base added and make a graph of pH versus Vb: Vb = 0, 1, 5, 9, 10, 11, 15, 19, 20, and 22 mL

9. ## math

Let C = 2.32 N + 34180 represent the cost (C) of raising a child to 18 years of age, on an income (N). If the cost is \$120,000, what is the income?(

10. ## maths

a car travels 1 km in which each wheel makes 450 revolutions. Find the radius of its wheel

11. ## algebra

a building in a city has a rectangular base. the lenght of the base measures 70 ft less than twice the width. the perimeter of this base is 820 ft.

12. ## math

Una makes \$64 a week, plus 15 percent of the cost of meals that she serves. Use the equation, y = 0.15x + 64, to predict what she makes in a week when she serves \$355 worth of meals

13. ## Titration

Consider the titration of 100.0 mL of 0.100 M NaOH with 1.00 M HBr. Find the pH at the following volumes of acid added and make a graph of pH versus Va: Va = 0, 1, 5, 9, 9.9, 10, 10.1, and 12 mL.

14. ## Math

prove that sinA/(1+cosA) + (1+cosA)/(sinA) = 2cosecA

15. ## Geometry

Find the area of a regular pentagon with a side of 6ft. Give the answer to the nearest tenth. 123.9ft2 49.5ft2 61.9ft2 12.4ft2

16. ## physics

Q8: Two sinusoidal waves with the same amplitude of 9.00 mm and the same wavelength travel together along a string that is stretched along an x axis. Their resultant wave is shown twice in fig., as valley A travels in the negative direction of the x axis

17. ## Chemistry

Knowing that delta Hvap for water is 40.7 kJ/mol, calculate Pvap of water at 46 C

18. ## Chemistry

The vapor pressure, P, of a certain liquid was measured at two temperatures, T. Represented in a table: T (in Kelvin) ------- P(in kPa)  --------------- [4.00]  --------------- [8.59] What is the enthalpy of vaporization for this liquid? (Delta H

19. ## math

Chicago, Illinois has a longitude of 88 degrees West and a latitude of 42 degrees North. Indianapolis, Indiana is located at 86 degrees West and 40 degrees North. At this longitude/latitude, each degree is about 53 miles. What is the distance between

20. ## Chemistry

You have a chemical sealed in a glass container filled with air. The glass container has a mass of 200.0 grams and the chemical has a mass of 850 grams. The total mass of the setup is 1050 grams. The chemical is ignited by means of a magnifying glass

21. ## English ~ Clauses

Hey guys! I was hoping that someone could look over my answers & help me out with the ones I didn't get? Thanks :) Directions: Identify the subordinate clause. Tell whether it is a noun, adj, or adv. clause. Indicate whether it's introduced by a relative

22. ## Chemistry

Give the formula of each of the following copper minerals: A. cuprite, copper (I) oxide B. chalcocite, copper (I) sulfide C. covellite, copper (II) sulfide

23. ## math

Bart had an income of \$38,250 last year. If the inflation rate is 4.5%, what is his purchasing power?

24. ## geometry

If BE bisects measure ABD and measure EBD equals 32 find measure ABD

25. ## Physics

An object with a charge of -4.4 uC and a mass of 1.4×10^−2 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight. Find the magnitude of the electric field. Find the direction of the electric field. If

26. ## Math

Lines A and B are perpendicular and have the same x-intercept. The equation of line A is x+2y-4=0. Determine the y-intercept of line B.

27. ## Geometry

Find the surface area of a sphere with a circumference of 40 ft. Round to the nearest tenth.

28. ## geometry

if line BE bisects m

29. ## Geometry

The measures of 6 of the interior angles of a heptagon are: 120°, 150°, 135°, 170°, 90°, and 125°. What is the measure of the largest exterior angle? 90° 80° 75° 85°

how many different ways can eight cars finish in a race 1st, 2nd, 3rd ?

31. ## Chemistry :/

A 10.231-g sample of window cleaner containing ammonia was diluted with 39.466 mL of 0.1063 M HCl to reach the bromocresol green end point. Find the weight percent of NH3 (FM 17.031) in the cleaner.

32. ## Math

An animal shelter have 1008 cats, dogs, and rabbits. The ratio of the number of dogs to the number of cats in the animal shelter is 3:7. The ratio of the number of rabbits to the number of dogs is 2:5. How many rabbits are there in the shelter?

33. ## Chemistry

What is the empirical formula for a compound which contains 67.1 percent zinc and the rest is oxygen

34. ## American Lit

Let a man know his worth, and keep things under his feet. Let him not peep or steal. Or skulk up and down with the air of a charity-boy, or an interloper, in the world which exists for him. What does this passage mean?

35. ## Physics

Mike pulls a 4.5 kg sled across level snow with a force of 250 N along a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.8 m, how much work does Mike do?

36. ## chemistry

do the arithmetic and give the answer to the correct number of significant figures. (1.5 x 10^-4 x 61.3) + 2.01 =

37. ## Higher Chem

A 0.5537-g sample containing oxalic acid required 21.62 mL of 0.09377 M NaOH for titration. If the reaction is H2C2O4 + 2NaOH  Na2C2O4 + 2H2O, calculate the % H2C2O4 in the sample.

38. ## math

Quadrilateral KLMN has vertices K(-2,-2), L(1,1), M(0,4), and N(-3,5). It is first translated by (x + 2,y - 1) and then translated by (x - 3,y + 4). When a figure is translated twice, a double prime symbol is used. Find the coordinates of K" L" M" N" after

39. ## Science

Which of the following is a way to improve the efficiency of a heat engine? increase Qh reduce Qh reduce Wnet increase Qc A What are the energies associated with atomic motion called? kinetic energy potential energy bond energy internal energy D A 0.10 kg

40. ## chemistry

A certain substance has a heat vaporization of 47.97 kJ/mol. At what Kelvin temperature will the vapor pressure be 7.50 times higher than it was at 297K? Please help me! I don't understand heat vaporization questions

41. ## World History

1. The Cossacks were a nomadic people who a. led the Russian expansion overseas b. led the Russian expansion eastward towards Siberia c. led the Russian political expansion south and west d. led the Russian expansion to the new world B? 2. the conflict

42. ## English

Identify the sentence that uses apostrophes correctly. a) Suzannes car needs’ a new muffler. b) Suzanne's car needs a new muffler. c) Suzanne’ car needs a new muffler. d) Suzannes’ car needs a new muffler.

43. ## stats

A final exam in Math 160 has a mean of 73 with standard deviation 7.73. Assume that a random sample of 24 students is selected and the test score of the sample is computed. Assuming the scores are normally distributed, what percentage of sample means are

44. ## Acid-base titration

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.

45. ## spanish

please unscramble licbohe, sequi, lanesbocto, taaconni, taquenioic, anitpaje, nigmisaa, ufblot marocneai

46. ## Economics

21. The EU is an example of a trading bloc, or _______, that has a common external tariff and no internal tariffs, and that coordinates laws to facilitate trade between member countries. A. strategic alliance B. joint venture C. common market D.

47. ## Geometry

The point A (3, 4) is reflected over the line x = 2, and then is reflected over the line x = -4. What are the coordinates of A'? (1, 2) (9, 4) (-9, 4) (1, 4)

48. ## physics

Calculate the total force of the atmosphere acting on the top of a table that measures 1.9 m by 2.3 m.

49. ## Geometry

Find the surface area of a conical grain storage tank that has a height of 42 meters and a diameter of 20 meters. Round the answer to the nearest square meter. 3,028m2 3,971m2 1,357m2 1,671m2

50. ## physics

A small mailbag is released from a helicopter that is descending steadily at 3.00 m/s. (a) After 2.00 s, what is the speed of the mailbag? v = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the

51. ## Physics

Two charges, -15 and +4.5 µC, are fixed in place and separated by 2.8 m. At what spot along a line through the charges is the net electric field zero? What would be the force on a charge of +1 µC placed at this spot?

52. ## operations management

Trucks are required to pass through a weighting station so. ... a weighting station so that they can be checked for weight violations. Trucks arrive at the station at the rate of 40 an hour between 7:00 p.m. and ... How many trucks would you expect to see

53. ## Physics

At a picnic, there is a contest in which hoses are used to shoot water at a beach ball from three different directions. As a result, three forces act on the ball, F1, F2, and F3. The magnitudes of F1 and F2 are F1= 50.0 N and F2 = 90.0 N. F1 acts under an

54. ## chemistry

how many significant figures does the sum of 8.520 the 2.7 contain?

55. ## Math

it costs \$175 to rent a jet ski for 2 hours. it costs \$300 to rent a jet ski for 4 hours. write an equation that represents y (in dollars) of renting a jet ski for x hours.

56. ## statistics

Heights of young adult U.S. women are approximately normal with mean 64" and standard deviation 2.7". What proportion of all U.S. young adult women are taller than 6 feet?

57. ## Titration Graph?

Use a spreadsheet to prepare a family of graphs for the titration of 50.0 mL of 0.020 M H2A with 0.100 M NaOH. Consider the following cases: (a) pK1 = 4.00, pK2 = 8.00; (b) pK1 = 4.00, pK2 = 6.00; (c) pK1 = 4.00, pK2 = 5.00.

A charge, Q2 = -9.00x10-6 C, is 12.00 cm to the right of charge Q1 = 10.00x10-6 C. Where can a third charge be placed, along the line connecting Q1 and Q2, such that it experiences no net force? Give distances relative to Q1 and use a plus sign if the

59. ## Chemistry

A compound decomposed by first order rxn. The concentration of compound decreases from .1180 M to .0950 M in 5.2 min. What fraction of the compound remains after 6.7 minutes?I'm thinking I set up a proportion maybe. Any ideas how to tackle this problem?

60. ## Physics

A stone whirled at the end of a rope 30 cm long, make 10 complete revolutions in 2 seconds. Find (i)the angular velocity in radians per seconds (ii)the linear speed (iii)the distance covered in 5 seconds.

61. ## ChemB

The activity of carbon 14 in living tissue is 15.3 disintegrations per minute per gram of carbon. The limit for reliable determination of age is based on carbon 14 is .10 disintegration per min per gram of carbon. Calculate the max age of a sample that can

62. ## Physics

The electric field at the point x=5.00 cm and y=0 points in the positive x direction with a magnitude of 10.0 N/C. At the point x=10.0 cm and the electric field points in the positive x direction with a magnitude of 16.0 N/C . Assume this electric field is

63. ## Math

Use the cofunction identities to write an expression that is equivalent to each of the following expression. a) sin(pi/6) sin=cos(pi/2 - pi/6) What do I do next?

how many integer values are there for K for which 4X squared plus KXY minus 9Y squared is factorable

65. ## Math

A line intersects the graph of y=x^2 twice. One point has an x-coordinate of -4, and the other point has an x- coordinate of 2. A. Find the equation of the line. B. Find the measure of the angle that the line makes with the x-axis.

66. ## Psychology

Can someone please explain the exotic becomes erotic theory by daryl bem, i have read it but i cant understand what its really saying thank you

67. ## Geometry

The point A (3, 4) is reflected over the line x = 2, and then is reflected over the line x = -4. What are the coordinates of A'? (1, 2) (9, 4) (-9, 4) (1, 4)

68. ## math

If your annual income from a part-time job is \$4523, and the inflation rate is 6 percent, what is the purchasing power of your income?

69. ## Physics

Find the electrical potential energy (EPE) of three point charges placed as follows on the x-axis: +2.0 μC at x = 0, +3.0 μC at x = 20 cm, and +6.0 μC at x = 50 cm. Take the (EPE) to be zero when the charges are far separated.

70. ## Brief Calculus

Calculate the average rate of change of the given function over the given interval. Where appropriate, specify the units of measurement. f(x) = 1/x;[2, 7] I used the f(b)-f(a)/b-a and I got -.071 and it said I was wrong could you please help me find my

71. ## chemistry

Calculate the value of DHo for the reaction 2 CH4 (g) -> C2H6 (g) + H2 (g) given the following thermochemical equations: C2H2 (g) + H2 (g) -> C2H4 (g) delta = – 175.1 kJ C2H6 (g) -> C2H4 (g) + H2 (g) Delta = + 136.4 kJ C2H2 (g) + 3 H2 (g) -> 2 CH4 (g)

72. ## statistics

A researcher wishes to estimate the mean height of women aged between 60 and 65 in the US. She desires a margin of error of 0.2 inches. Past studies suggest that a population standard deviation deviation of 3.2 inches is reasonable. Estimate the minimum

73. ## physics help

help me with this question 2. A hydrogen electron drops from the n=4 level to the n=1 level. A. What is the energy of an emitted photon? B. Calculate the frequency of the photon. C. Calculate the wavelength of the photon.

74. ## physics

An airplane is flying horizontally at 115 m/s, at a 20.5 degree angle north of east. State its velocity in rectangular coordinates. Assume that north and east are in the positive direction.

75. ## Science

Do P waves travel faster through gas, liquids, or solids?? I couldn't find the answer in my book OR the internet. Some smart person, please search your brain and help me out!! Thanks :)

76. ## Physics

Two point charges are fixed on the y axis: a negative point charge q1 = -26 µC at y1 = +0.21 m and a positive point charge q2 at y2 = +0.38 m. A third point charge q = +8.5 µC is fixed at the origin. The net electrostatic force exerted on the charge q by

77. ## chemistry

How many milliliters of 16.0 M HNO3 stock solution wouuld be required to prepare 100.0mL of 3.00 M HNO3? Use the formula M1V1=M2V2

78. ## physics

A car is driven 30km west and then 80 km southwest. What is the displacement of the car from the point of origin (magnitude and direction)?

79. ## physics

Two point charges, the first with a charge of +3.19×10^−6 C and the second with a charge of -4.32×10^−6 C , are separated by 28.0 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force

80. ## math

A six sided die is rolled three times. List possible outcomes and find the probability of rolling exactly one 6.

81. ## chemistry

CxHyCz compound weighs 132 amu, what is the molecular formula?

82. ## Probabilty & Statistic

A random sample is selected from a normal population with a mean of __40 and a standard deviation of __10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M _ 42. a. How large a sample is necessary for

83. ## PHYSICS

Scientists call a theory that unites many ideas in a simple way "beautiful." Are unity and simplicity among the criteria of beauty outside of science? Support your answer

84. ## physics

A thermometer of mass 0.0550 kg and of specific heat 0.837 kJ/kg•K reads 15.0°C. It is then completely immersed in 0.300 kg of water, and it comes to the same final temperature as the water. If the thermometer reads 44.0 °C, what was the temperature of

85. ## Literacy

In global trade, when the difference between money coming into a country from exports and money leaving a country due to imports or money flows from other factors is known as the A. balance of payments. C. balance of trade. B. trade offset. D. trade

-x/6-8=10

87. ## Amount paid - keep getting conficting answers

When Melissa went to purchase a purse from a street vendor, she negotiated a purchase price that was 5% less than the \$170.00 marked price, plus 8% sales tax on the purchase price. If she has \$475.00 in her checking account, how much did she pay for the

88. ## math

A student is awake k hours each day and spend k/5 hours each day doing homework. In terms of k, how many days will it take the student to complete homework assignments that require a total of 20 hours?

89. ## accounting

P4-2A Gil Vogel started his own consulting firm, Vogel Consulting, on June 1, 2012. The trial balance at June 30 is as follows. VOGEL CONSULTING Trial Balance June 30, 2012 Debit Credit Cash \$ 6,850 Accounts Receivable 7,000 Prepaid Insurance 2,880

90. ## chemistry

A piece of metal with a mass of 5.50 grams changed in temperature from 25.0 to 55.0C when 21.3 joules was absorbed. The specific heat of the metal is a. 0.256 b. 0.129 c. 3.91 d. 7.75 e. 0.710J g-1 oC-1 desperately need help!

91. ## Math

The center of a circle is A(-3,3) an B(1,6) is in the circle. Find the area of the circle in terms of pi. a^2 + b^2 = c^2 radius is 5 and 25pi

92. ## electric force/field

Three point charges, A = 2.2 µC, B = 7.5 µC, and C = -3.9 µC, are located at the corners of an equilateral triangle . Find the magnitude and direction of the electric field at the position of the 2.2 µC charge. magnitude = . N/C direction =

93. ## Chemistry

How many grams of butane must be burned to provide the heat needed to melt a 85.0-g piece of ice (at its melting point) and bring the resulting water to a boil (with no vapourization)? Assume a constant pressure of 1 bar and use the following data:

94. ## Biology

I just want to know if my answers are right for this folowing: 1. The nose is MEDIAL to the ears. 2. The elbow is DISTAL to the shoulder and PROXIMAL to the wrist. 3. The heart is ANTERIOR to the spine. 4. The stomach is DEEP to the ribs. 5. The pinky

95. ## geometry

In parallelogram ABCD, BC = 8, DC = 12, and measure of angle D is 50 degrees. Find the area of the parallelogram to the nearest tenth.

Find the value fir each expression. Show your work. (13.28 - 7.8) divided by 4. I have the answer in the back of my book and when I try to work the problem out I keep getting the wrong answer. The answer is supposed to be 1.345 I can get the 1.34 but I get

97. ## English

Write a sentence about what the future holds using 1 subject pronoun 2 adjectives 1 proper noun

98. ## MATH

THE LINE Y=X+4 INTERSECTS THE CURVE 2X^2 + 3XY - Y^2 + 1 = 0

99. ## Economics

6. The idea that countries should produce and sell goods that they produce most effectively and efficiently, and buy goods that other countries produce most effectively and efficiently, is known as A. absolute advantage theory. C. efficiency balanced

100. ## Physics

A golfer, putting on a green requires three strokes to “hole the ball.” During the first putt, the ball roles 5.0m due east. For the second putt, the ball travels 2.1m at an angle of 20 degrees north of east. The third putt is 0.50m due north. What

101. ## physics

A meteor streaking through the night sky is located with radar. At point A its coordinates are (5.20km,1.20km), and 1.16s later its has moved to point B with coordinates (6.08km, 0.900km ). a) find the x comonent of it average velocity between A and B.

102. ## math (stats)

A biology professor gives a surprise quiz consist of a true/false question followed by a multiple choice question with four possible answers. If both questions are answered with random guesses, find the probability that both responses are correct. Please

103. ## Physics

Mike pulls a 4.5 kg sled across level snow with a force of 250 N along a rope that is 35.0° above the horizontal. If the sled moves a distance of 63.8 m, how much work does Mike do? please show steps/equation!

104. ## Geometry

Triangles ABC and DEF are congruent. The length of the line segment AB is 5 yards, the length of the line segment BC is 7 yards, and the length of the line segment CA is 9 yards.

which of the following is an example of business communication 2.0 in action

106. ## Physics

A uniform electric field of magnitude 2.70×10^4 N/C makes an angle of 37 degrees with a plane surface of area 1.60×10^−2 m^2 . What is the electric flux through this surface?

107. ## Science

Dingtu can lift a weight of 60 kg on the earth. How much will he be able to lift when on moon? A. 60 Kg B. 10 Kg C. 360 Kg D. 120 Kg

108. ## thermodynamics

A thermometer of mass 0.0550 kg and of specific heat 0.837 kJ/kg•K reads 15.0°C. It is then completely immersed in 0.300 kg of water, and it comes to the same final temperature as the water. If the thermometer reads 44.0 °C, what was the temperature of

109. ## math

3+siny = 3cos^2 y for 0

110. ## chemistry

Which of the following equations represents a reaction for which the delta H can be called a standard enthalpy of formation, delta Hf? a) FeO(s) + CO2(g) -> FeCO3(s) b) 1/2 N2(g) + 2 O(g) -> NO2(g) c) 2 Na(s) + Cl2(g) -> 2 NaCl(s) d) Ba(s) + N2(g) + 3

111. ## chemistry

For the reaction Al (s) + 3 HCl (aq) -> AlCl3 (s) + ₃/₂ H2 (g), it was observed that when 4.00 g of aluminum reacted with excess HCl, exactly 30.0 kJ of heat were released. The delta H for this reaction is a) – 91.3 kJ b) – 120 kJ c) – 202 kJ d)

112. ## College algebra

Annual profit in thousands of dollars is given by the function, P(x) = 200√ x - 3 + 10,000, where x is the number of items sold in thousands, x ≥ 3. describe the meaning of the number 3 in the formula describe the meaning of the number 10,000 in the

113. ## GPA help

if i had a 1.875 and i get a C to go up to a B what is my GPA? will it be a 2.0? i need help i want to play baseball.

114. ## chemistry

For the reaction Al (s) + 3 HCl (aq) -> AlCl3 (s) + ₃/₂ H2 (g), it was observed that when 4.00 g of aluminum reacted with excess HCl, exactly 30.0 kJ of heat were released. The delta H for this reaction is a) – 91.3 kJ b) – 120 kJ c) – 202 kJ d)

115. ## Chemistry

A certain microwave oven delivers 633 watts (J/s) of power to a coffee cup containing 53.1 g of water at 25°C. If the wavelength of microwaves in the oven is 9.75 cm, how long does it take, and how many photons must be absorbed, to make the water boil?

116. ## physics

A ball is thrown vertically upward with a speed of +10.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is its

117. ## physics

A uniform electric field ofmagnitude 384 V/m is directed in the positive x-direction. Suppose a 16 ìC charge moves from the origin to point A at the coordinates, (20 cm, 60 cm). What is the absolute value of the change in potential from the origin to

118. ## Geometry

The measures of 6 of the interior angles of a heptagon are: 120°, 150°, 135°, 170°, 90°, and 125°. What is the measure of the largest exterior angle? 90° 80° 75° 85°

119. ## spell

Which of the following is NOT something to check during a thorough revision? Style and tone Organization Punctuation and spelling Content and clarity

120. ## MATH

If you do not consider air resistance, gravity causes a falling object to descend a distance of (9.8)t2 where t is the time in seconds. If a 16 pound bowling ball is dropped from the tallest building in the world, how many meters does it fall during the

asked by HELP ME IN MATH
121. ## chemistry

For the reaction Al (s) + 3 HCl (aq) à AlCl3 (s) + ₃/₂ H2 (g), it was observed that when 4.00 g of aluminum reacted with excess HCl, exactly 30.0 kJ of heat were released. The DHo for this reaction is a) – 91.3 kJ b) – 120 kJ c) – 202 kJ d) –

122. ## Math

Lindsay paid \$4.40 for a gallon of ice cream.How much would a quart cost?How much would a pint cost?

Using the FIFO method of inventory pricing, what is the dollar value of ending inventory if there were 300 units on hand on December 31? Annual inventory of windshield wipers January 1 Beginning inventory 300 units@11.00 March 15 Purchase 150 units@10.50

124. ## PHYSICS

Please help and let me know if I did something wrong. If a cart is released from rest at a 10 meter incline and takes 28 seconds to travel down this incline. 1. Calculate the average speed of the cart? I wrote s=ad/at=10m/28 sec = 357 m/s 2. calculate the

125. ## English

I don't get transitive verbs. In the sentence "Some reach a height of 120 feet," I was told it was transitive. But why? I'm unsure what the direct object is.

126. ## MATH

I have no idea on how to get started. If you do not consider air resistance, gravity causes a falling object to descend a distance of (9.8)t2 where t is the time in seconds. If a 16 pound bowling ball is dropped from the tallest building in the world, how

127. ## Calculus II

Find the volume of the solid generated by revolving the triangular region with vertices (1,1), (b,1), and (1,h) about: a) the x-axis b) the y-axis

128. ## trig

How do you decide if csc=74 is greater than or less than cos=74 without using a calculator?

129. ## computer

You will need to design an application that will prompt a user for his or her hourly pay rate, hours worked, and whether he or she is single, married, divorced, or widowed. It will then calculate the user's gross and net pay. If the user works more than 40

130. ## chemistry

An insulated beaker contains 250.0 grams of water at 25oC. Exactly 41.6 g of a metal at 100.0oC was dropped in the beaker. The final temperature of the water was 26.4oC. Assuming that no heat is lost in any other way, calculate the specific heat of the

131. ## physics

Rachel is asked to calculate the density of a liquid. She correctly measures the mass of the liquid to be 13.9 grams, but she incorrectly measures the volume of the liquid to be 8 mL. The actual volume of the liquid is 7 mL. If Rachel uses the following

132. ## health

To protect itself from stress, the nervous system triggers the release of hormones such as adrenaline. A.True B. False I think it is A true

133. ## math

Suppose you are looking for a job. You interview with a company that has 10 general employees each make \$100 per day, 7 assistants each make \$400 per day, 3 managers each make \$900 per day, and the owner who makes \$1900 per day. The interviewer tells you

Pick two similar small businesses in the same industry with which you are familiar, one successful and one not so successful. Describe them in a post, and compare and contrast these businesses. What is the difference in management style between the two

135. ## physical science

What is the pH of a 0.01 M solution of the strong acid HNO3 in water?

136. ## World History

2. the conflict that was fought between supporters of the King and supporters of Parliament was called the a. Thirty Years' War b. War of the Roses c. Parliamentary Revolution d. English Civil War D? 6. One of the ways the Manchus tried to distinguish

137. ## math

suppose you had \$1.76 in dimes and pennies. What is the fewest number of coins you could have? What coins are they?

138. ## Math

Kelly is 66 inches tall. How tall is she in feet and inches? For feet I got 5.6

139. ## algebra

What could you do to the equation 4xy equal 32 to keep the sides equal

140. ## physics

I need help with this problem so please help me. 1. A certain photoelectric surface has a threshold frequency of 6.2*10^14 Hz. A. How much kinetic energy is required to produce an electron emission? B. if the surface is illuminated with light that has a

141. ## Mileage/graph

I tried this and needed to graph. But, I want to find out what I did incorrect. Suppose that a car rental agency gave you the following choices. Option A: \$30 per day plus 40 cents per mile. Option B: flat \$50 per day (a) Write equations for cost per day c

for all values of theta where 0degrees

143. ## opinion

what is the best invention to YOU???? what is your favorite invention that you use the most???

144. ## algebra

how do you Write a point-slope equation for the line with the given slope that contains the given point. with m=-3;(-2,-5)

145. ## English

write a sentence about what the future holds using 1 abstract noun 1 subordinate clause. and then another sentence same topic using 1concrete noun 1 adjectives 1 prepositional phrase 1 personal pronoun and 1 interjection.

146. ## World History

Need help with these: 28. Led a group of women who wrote a declaration of rights for women that was rejected by the National Assembly - Can't figure out who this was.. 34. Ruler whose military conquests extended Persia's boundaries? 39. Opened Russia to

147. ## college internship application

The internship that I am applying for requires a recent writing sample to be sent along with my application but the sample I want to use doesen't exactly scream professional. I recently did a persuasive essay that I am really proud of on the existance of

148. ## Math

How many km in 5928m? 1km=1000m 5km=5000m How do I get to 5928? Do I divide 1000 and 5928?

149. ## chemistry

Hgl2(s)=2NaNOg(ag) a combination,decomposition,single replacement or double replacement

150. ## Psychology

I was assigned a topic nature vs nurture: are children born gay or evolved into,,,,i would appreciate if anyone knows of any book sources that can help me and any secondary source because i don't know where to start thank you in advance

151. ## Presentation

After completing the Unit 4 Live Presentation, discuss each of the following topics in a 3 – 4 paragraph essay: Discuss at least two specific aspects of delivering the Unit 4 Live Presentation that were easier than you thought they would be. Explain the

152. ## Chemistry

A student mixed 15.0 mL of a solution of 0.0200 M ferric chloride FeCl3, with 25.0 mL of water. Calculate the moles of iron ion, Fe +3 in the resulting solution. (I think this is a Dilution problem, but I wasn't really sure how to start it out. Any help

153. ## Chemistry

A compound is characterized by the following constants: Heat of fusion = 75 cal/g Heat of vaporization = 20 cal/g The heat of deposition for the same compound is

154. ## biotech college

What is 29 miles per hour in units of m/s? 1 mile is 5280 feet, 1 meter is 3.3 feet, 1 hour is 60 minutes, and 1 minute is 60 seconds.

155. ## Chemistry

How would i summarize the physical properties of ionic compounds, non polar covalent compounds, polar covalent compounds and covalent solids? (this is one part of the lesson i never understood)

156. ## math

A building is 862 feet tall. Use the function h(t) = 16t2 to approximate how long it would take an object to fall from the top. Round to the nearest tenth. Hint: h is your height.

157. ## math

Express 3.042 as a fraction in simplest form

158. ## math (statistics)

Suppose you are looking for a job. You interview with a company that has 10 general employees each make \$100 per day, 7 assistants each make \$400 per day, 3 managers each make \$900 per day, and the owner who makes \$1900 per day. The interviewer tells you

159. ## TRIG HELP ASAP

I need help trying to find the major and minor axis on this problem: x^2+3y^2-6x+24y+6=0

160. ## Calculus II

Find the volume of the solid generated by revolving R about the x-axis where R is the region enclosed by the larger curve y=(e^2x)/3, the smaller curve y=1 and the line x=ln(3)

161. ## Science

Suppose you find a fossil imprint of an animal that existed many years ago.How can I make a model to compare that imprint to the foot of an animal living today?

162. ## Math

Can you please help me with a math problem Suppose the ball was 3.24 feet above ground when it was hit, and that it reached a maximum height of approximately 102.51 feet when it had traveled a ground distance of approximately 214.26 feet. The ball lands

verify 1-sintheta * costheta * tantheta = cos^2theta

164. ## Literacy

The trend toward two-family income has led to A. policies allowing only one family member to work for a company. B. flexible work schedules, pregnancy benefits, and elder-care programs. C. businesses paying lower wages and hiring fewer workers. D. fewer

165. ## Literacy

The idea that countries should produce and sell goods that they produce most effectively and efficiently, and buy goods that other countries produce most effectively and efficiently, is known as A. absolute advantage theory. C. efficiency balanced trade.

166. ## math

if you know the number of faces on a pyramid you know the number of vertices true or false

167. ## Chemistry

What type of bond is formed when two or more non metals bond with each other? and What type of bond is formed when a metal and non metal bond with each other?

168. ## physics science

3. An unknown element produces a spectral line of 425nm. A. Calculate the energy of the emitted photon in joules. B. What is the energy of the emitted photon in electron-volts?

Learning economics is like having you own crystal ball. The more you understand it as a social science, the more you understand how our economy and political system works. I say like a crystal ball, because you will be able to see things that other people

170. ## Economics

11. Often, the _______ the risk, the _______ the rewards. A. higher; higher C. higher; lower B. lower; higher D. faster; quicker 12. When the government of Indonesia imposes a tax on imported electronics products to help its young electronics industry

171. ## invention

Who invented the: television automobile phone computer circular saw And when were they invented??

172. ## 8th grade U.S history

1. Compare and contrast the cultures of two native tribes. Tell what you did to communicate the United States' sovereignty in the region to two different tribes. 2. Name two tribes that you think would enter into exclusive fur trade with the United States.

173. ## calculus

Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the line x = 6. y = 6 − x y = 0 y = 5 x = 0

174. ## physical science

a soccer player kicks a ball straight up into the air at 6 m/s.ignore air resistance.what is the velocity of the ball at its highest point?

175. ## Algebra

Mona uses 1 1/2 cups less whole wheat flour than white flour. She uses a total of 4 1/2 cups of flour. How much of each type flour does she use?

176. ## Physics

A ball is thrown horizontally from the roof of a building 29.7 m high at 39.6 m/s. (a) What is the vertical velocity of the ball when it lands? (use down as the positive y-axis direction)b) What is the ball’s total velocity (speed and direction) when it

177. ## thermodynamics

You allow a gas to expand freely from volume V to volume 2V. Later you allow the gas to expand freely from volume 2V to volume 3V. Is the net entropy change for these two expansions greater than, less than, or equal to the entropy change that would occur

178. ## Math

Solve each equation write answer on simplest form 1/4x = 6 2t = 4/7 Can you show me how to do didn't understand on class. Working on solving fraction equation. Multiply and divide

179. ## English

Sentence number 5 was incomplete. I think I should leave out "in part two". I urgently need you to have a look at these other sentences, too 1) I hope you can help me find a Scottish school which is interested in a partnership with our school. 2) In the

180. ## Calculus

Using Descartes' Rule of Signs, solve: f(x)=x^3+x^2-x+1.

181. ## geometry

The legs of a right triangle measure 3x 8. A cube has edge lengths and 15. If the hypotenuse measures of 6 inches. What is the 3x+3, what is the value of x?

182. ## geometry

If line segment A is parallel to line segment B and m

183. ## Chemistry

What happens to the valence electrons in metallic bonds?

184. ## physics

1. You allow a gas to expand freely from volume V to volume 2V. Later you allow the gas to expand freely from volume 2V to volume 3V. Is the net entropy change for these two expansions greater than, less than, or equal to the entropy change that would

185. ## Math

How many feet are in 10 inches? I know 1foot=12inches but I don't know how to find out how many feet are in 10inches

186. ## college algebra

find the real solutions, if any. use the quadratic formula 2/3x^2 - x -3=0

187. ## Math

My son is grade 4 his homework have question is : when you multiply any number by 1,what is the product ? Please help !!!!

188. ## Math

How many miles in 1760feet? Is it 1/3?

189. ## math

Verify: 1/(1-sintheta) * 1/(1+sintheta) = sec^2theta

191. ## math

How about for this question? 76in=__ft__in 6ft 4 in?

192. ## physics

A sniper is in training. He discovers the target is at 1000 meters right north to where he ambushes. According to his measurement, it's a moving at a uniform speed of 20 meter/second towards east. What is the position of the target after 2 seconds?

193. ## health

compare and contrast methods of coping with stress.

194. ## math

What coulld you do to the equation 4xy equal to keep the sides equal

195. ## Chemistry

What are three biological molecules that have carbon backbone??? (molecules that are found in the human body)

196. ## Law

Demand letters are a type of __________ letter. (Points: 5) informative advisory confirmation cover is it D

197. ## physics

Identify correct unit of a measurement. Distinguish Between mass and volume

198. ## English

if i had a 1.875 and i get a C to go up to a B what is my GPA?

199. ## social studies

i need to find the origina and meaning of latin american countries: costa rica ecuador jamaica can you help me with this or help with a website for this?

200. ## History

Who was the only President to kill another man in a duel?

201. ## chemistry

The physician has prescribed a medication of 3.5 mg/kg of body weight. If you give 297 mg of medication what is body weight of patient in kg? Is there a converstion formula?

202. ## Chemistry

Hi I need help with a problem The accuracy of what measurement must be increased in order to increase the accuracy for the specific heat? Thank You!

Can you please tell me if 14=-(p-8) is 6= -p .....

204. ## math

suppose you have 43 coins, all dimes and pennies that totals \$2.68. How many of each coins do you have?

205. ## earth

Two rockets are orbiting the earth, traveling in perfect circles with equal radii. The velocity of rocket A is twice that of rocket B. What can be said about their respective centripetal accelerations?

206. ## Math

solve 4 sin x = cos x for 0

207. ## Chemistry

How do electrons interact in non polar covalent bonds, polar covalent bonds, and ionic bonds?

208. ## matj

prove that (cotx+tanx)(cotx-tanx) = 1/(sin^2 x) - 1/(cos^x)

209. ## Math

The straight line x+2y+4=0 passes through (4,k), then value of k=?

210. ## english

What are the nouns and verbs in the sentence The Lord is my strength and my salvation; in him I will trust.

211. ## physics

How much power is required to do 110 J of work on an object in a time of 0.4 s? W How much power is required if the same work is done in 5 s? W

212. ## PHYSICS

HOW DO YOU FIGURE OUT A VALUE OF ACCELERATION? CAN IT BE THE SAME AT TWO DIFFERENT TIMES?

213. ## physics

1. Calculate the radius of orbit for a hydrogen electron in the n=3 level. 2.The half life of an unknown substance is one minutes. If the initial number of particles is 20 how many particles will remain after two minutes have elapsed?

214. ## Math

From 1965 to 1996, CAnadian Gary Duschi made the world's longest gum wrapper chain. It was 18721 feet long. About how many miles long was the gum wrapper chain?

215. ## Chemistry

A solution contains 1.53x10-3 M Ca(NO3)2, How many nitrate ions are there in 1.2x10-6 L (1.2 µL) of this solution?

216. ## math

Solve 2³ -1 • (3 + 6) + 3

217. ## math

List and explain matrix

218. ## Chemistry

How does the formation of metallic bonds explain the fact that metals tend to conduct electricity?

219. ## Mathliteracy

Simplify 50kg-(12x0,450kg)to simplest form pls view all th steps

Pick two similar small businesses in the same industry with which you are familiar, one successful and one not so successful. Describe them in a post, and compare and contrast these businesses. What is the difference in management style between the two

221. ## Science/English

I still need the help of a science teacher. I urgently need to know where to look for English vocabulary used to describe the equipment of both a chemistry and a computer laboratory.

222. ## Bakersfield College

I need to analyze the influence that legal issues, ethics, and corporate social responsibility have had on management planning at BP. Provide at least one example for each. I have been recking my brain for 2 days now.

223. ## math

The distance, d, an object falls after t seconds is given by the equation d=-1/2(9.8)t^2 If t^2=83sec^2 then what is a good estimate for t?

224. ## World History

Whats is a legal ststem based on custom and court descicons?

226. ## English

As promised, I included 5 sentences. I hope the others were possible! 1) Winston lives a squalid existence in a one-room apartment in "Victory Mansions", eats black bread, synthetic meals, and drinks industrial-grade "Victory Gin." 2) He is discontent with

227. ## math

tiffany spent 1 7/12 hours doing homework. which of the following is the best estimate of how may hours she spent on her homework.

228. ## geography

how does an elevation map help me learn about geography?

229. ## PRECALCULUS

solve: tantheta = sintheta

230. ## Tough Math

Suppose the ball was 3.24 feet above ground when it was hit, and that it reached a maximum height of approximately 102.51 feet when it had traveled a ground distance of approximately 214.26 feet. The ball lands after traveling a ground distance of

231. ## MATH

THE LINE Y=X+4 INTERSECTS THE CURVE 2X^2 + 3XY - Y^2 + 1 = 0

232. ## math

Use the function V(T) = 18T2. A basketball player has a vertical leap of 38.5 inches. What is their hang time to the nearest hundredth of a second? Hint: T is your time in seconds.

233. ## Literacy

To help employees become more effectively productive, companies may form cross- _______ teams that draw on people from different departments to work on a special project. A. gender C. managerial B. trained D. functional my answer is C or D but i believe D

234. ## English

I am doing an application it says: Have you held any leadership type positions? Yes/No Please describe (100 words or less) I did not have any leadership type positions, so no. My question is, do I have to explain why I did not have any leadership or is it

235. ## poetry

iNeed Help Writing A *Parts Of Speech* Poem?_? HELP!! (;

236. ## English/Science

I urgently need to talk to one of your science teachers. In particular, I need help to define the objectives for our two-year Comenius project concerning biodiversity in water. This comparative study will be carried out in English. 1) As you know, it will

237. ## Science

I urgently need to talk to one of your science teachers. In particular, I need help to define the objectives for our two-year Comenius project concerning biodiversity in water. This comparative study will be carried out in English. 1) As you know, it will

238. ## math college algebra

write the quadratic function f(x)-x^2+14x-50 in the form f(x)=a(x-h)^2+k by completing the square and graph

239. ## math

The estimeatd difference of two numbers is 300. What might the numbers be? Explain how you found the numbers.

240. ## chemistry

How electrons interact in non-polar covalent bonds, polar covalent bonds, and ionic bonds?

241. ## chemistry

why are the atoms in metallic bonds positively charged?

242. ## Science

How does the formation of metallic bonds explain the fact that metals tend to conduct electricity?

243. ## physics

What is the pressure in Pascals exerted on a surface measuring 0.5 m^2 by a force of 125 N?

244. ## physics

A body is thrown with initial velocity 50ms-1 at the angle 60• With the horizontal. Calculate the horizontal range ,also calculate what another angle achieve the same?

245. ## algebra

what is the width and length of a box that is 315 cu. units?

246. ## physical science

a soccer player kicks a ball straight up into the air at 6 m/s.ignore air resistance.what is the velocity of the ball at its highest point?

247. ## biology

What changes occur when a solution goes from ph 5 to ph 8

248. ## University of Phoenix

I need to evaluate the planning function of management as it relates to the organization's goals and strategies. I need to use the steps in the planning process. I do not know where to begin The class in MGT/230

249. ## English

Is Famine considered as Extra curricular activity?

250. ## trig

tan-5n over 3

251. ## English

What is another way of saying 'i don't mind'?

252. ## science

What materials can I use to make an imprint like a fossil?

254. ## grammar

Complete with a suitable discourse markers My marks have been improving steadily.______I have had several successes on the sports field.

255. ## precalc help

cos(15degrees) this is not plugging it in the calculator, please help me right down steps. i really need help.

256. ## Literacy

7. These days, the leading commercial firms are found in the _______ sector. A. manufacturing C. service B. agricultural D. government my answer is C

257. ## Math

4.6meters=___millimeters. 4600?

258. ## Pre-Calculus

Verify: 1/(1-sintheta) * 1/(1+sintheta) = sec^2theta sec^2theta is the answer, it would be great if someone can do the steps for me. thank you.

259. ## English

I urgently need you to check these sentences. Thank you. 1) I'm pleased to get to know that the French delegation will be arriving on 26. January. On that day I have got afternoon lessons till 3.15 pm. 2) The school administration office will be opened

260. ## job fields or business

what is a similarity to video game designing if your looking for a job similar to it?

262. ## chemistry

how does electrons work together in non-polar covalent bonds?

263. ## math

pizza is sold every tuesday. Today is Tuesday. What reasoning can you use to describe what will happen, Inductive or Deductive reasoning?

264. ## Math

g(x) = 3x+5 / x-1 find the inverse function

265. ## math

Your math class has 27 students. There are 12 seniors and the rest are juniors. What is the senior-to-ratio?

266. ## Math

The ratio of the weight of Philipe's gerbil to the weight of Dana's gerbil is 4:7. When both gerbils are placed on a scale, the scale reads 99 ounces. how much does Dana's gerbil weigh?

267. ## science

if yuh test mice to see if eatin effects yur learning abitly should they be from different purebred strain

268. ## physical science

a soccer player kicks a ball straight up into the air at 6 m/s.ignore air resistance.what is the velocity of the ball at its highest point?

269. ## social studies

What were the conditions onthe holding parts of the ships where the slaves were stacked?

270. ## chemistry

lead melts at 106.0 degrees celcius, what is that temperature in faranheit

271. ## English grammar and checking

Hi, I answered these questions about Ella Enchanted movie and I need help seeing if they are correct, and I really need help double checking my grammar, punctuation and spelling. 1. For the movie, who are the main characters? #1- For the movie, the main

a/4-3/4=1/4

273. ## who invented.....

who invented the bra???

274. ## chemistry

what is saponication

275. ## Science

What kind of material do I use to make a modern day fossil?

276. ## math

Find the missing measurement 1 kg - blank ==400g

277. ## equivalent fractions

what kind of question is this: what is equivalent to

278. ## calculus

calculate y = log_10(x) where x = 0.3

280. ## English

write aa sentence about what the future holds using 1 possessive pronoun 2 adverbs and 1 compound predicate

281. ## math

5g = 5/6 i got: 1 1/6 3k = 1.9 i got: k = 1/3 are these right?

282. ## Word 2007-pages

Hello Does anyone know how to number the first 4 pages in a word document (2007) with roman numbers and then start from the fifth page with the number 1?

283. ## english

I read what you sent and I appreicate it but i have to write these sentences by tomorrow and i don't understand

284. ## bio

what is Ssarcina Lutea's margin shape on agar?

Ocean:sea::river:?

286. ## math

write each measurement,first in centimeters only and then in meters only 6m 80 cm 5m 29cm 6m 17cm 8m 67 cm HOW DO I DO THESE PROBLEMS PLEASE HELP.

287. ## Math literacy

Convert r500 to australian as exchanging rate

288. ## math

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.2 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.) M =

289. ## Chem

why don't nobel gases bond with other atoms?

4/7x-3=13

291. ## math

can you check: 3/5 a = 3 i got : a = 5 is that right?

use a formula sheet (i never got it) to help answer this: sin(75degrees)

293. ## alg2/trig

what is the smallest value of k that would make the roots of the equation x^2-2x-k imaginary? please help, no idea how to do this.

294. ## mAth

sketch y= sec theta

295. ## english

ok i will do it my self what is a infinipive an independent clause and a prepositional phrase

296. ## math

The estimeatd difference of two numbers is 300. What might the numbers be? Explain how you found the numbers.

297. ## geograghy

as believers in communism boslsheviks

1/5(x+10)-2

299. ## Math

when you multiply any number by 1,what is the product ?