# Questions Asked onOctober 25, 2010

1. ## Chem Class

The rate constant of a first-order process that has a half-life of 225 s is ?????? s-1. ok so i divided half life of 1st order= 0.693/K k i put 225 and i got 3.08 x 10^-3 is that right?

write an ionic and net ionic equation for the following reaction between Fe3+ and NH4OH. Please check my answer!! Thank you. My answer is: ionic: Fe3+(aq) + NH4OH--> Fe(OH)3 + NH4+ net ionic: Fe3+ +OH- -->Fe(OH)3

3. ## physics

A pelican flying along a horizontal path drops a fish from a height of 5.4m. The fish travels 8.0 m horizontally before it hits the water below. What was the pelican's speed?

4. ## chem

A 120.0 mL buffer solution is 0.105 M in NH3 and 0.135 M in NH4Br, What mass of HCl could this buffer neutralize before the pH fell below 9.00?

5. ## Chemistry check my answer?

Hi! is my answer correct? Consider the following chemical reaction: H2 (g) + I2 (g) 2HI (g) At equilibrium in a particular experiment, the concentrations of H2, I2, and HI were 0.15 M, 0.033 M, and 0.55 M, respectively. The value ofKeq for this reaction is

6. ## Physics

Rachel Pulls her 18 KG suitcase at at a constant speed by pulling on a handle that makes and angle (theta) with the Horizontal the frictional force of the suitcase is 27 N and Rachel exerts a 43 N force on the handle What angle does the handle make with

7. ## Math PIZZAZZ

PIZZAZZ Q: what should you say when you meet an angel plz give me answer!

8. ## math

How many people were at a party if There were 105 handshakes at a party and if each person at the party shook hands with exactly once with every other person. The answer is 15. How do I write the problem?

9. ## chemistry

The question below, i was wondering if it decrease because the N2 is on the right and so to add to left it would be too much so it gets rid of it by decreases and doing to the right? because the left side is (+) endothermic? sorry im a little confused. if

10. ## Chemistry

In a sample of solid Al(NO3)3, the ratio of aluminum ions to nitrate ions is (1) 1:1 (2) 1:2 (3) 1:3 (4) 1:6

11. ## Physics

Three blocks, connecting ropes, and a light frictionless pulley comprise a system, as shown. An external force P is applied downward on block A (12Kg). The system accelerates at the rate of 2.5m/s^2. The tension in the rope connecting block B (18Kg) and

12. ## calculus

A particle moves along the curve y=square sqrt 1+x^3. As it reaches the point (2,3), the y-coordinate is increasing ata a rate of 4cm/s. How fast is the x-coordinate of the point changing at that instant?

13. ## trig

determine an exact expression for the trigonometric function sin(13pi/12).

14. ## Chemistry

A student named KClO3 potassium chlorine (V) oxide. Explain why the use of the stock system is not correct in this case and write the correct name of the substance.

15. ## Chemistry Class

Dinitrogentetraoxide partially decomposes according to the following equilibrium: N2O4 (g) -> 2NO2 (g)

16. ## physics

A block of mass 3.90 kg is pushed 3.80 m along a frictionless horizontal table by a constant 16.0 N force directed 24.0° below the horizontal. What is th total work done on the block?

17. ## Science (Chemisty)

Scientists in 1962 became very excited when they were able to create xenon tetrafluoride. Why was this an unusual feat? Why was fluorine a good choice to try to react with xenon?

18. ## Physics

TWo blocks of massses 20 kg and 8 kg are connected together by a light string and rest on a frictionless level surface. Attached to the 8 kg mas is a second light string, which a person uses to pull both blocks horizontally. If the two-block system

19. ## Organic Chemistry Lab

For this week's lab, we have to devise our own separation and purification scheme. The mixture contains three compounds, however my problem lies in the fact that the composition isn't given to us. There are four possible combination 1)benzoic acid,

20. ## math

Robert spent 3/5 of his money on stereo equipment and 1/6 of the money he had left on lunch. He left the house with \$24. How much did robert return with?

make up a data set of at least 12 numbers that have the following landmarks. maximum 18 mode7 range 13 and median 12.

22. ## Chemistry

The Ka values of H2CO3 are shown below. Ka1 4.6 10-7 Ka2 4.4 10-11 What is the pH of a 0.17 M solution of Na2CO3?

23. ## physics

A 3.6 kg wood block is launched up a wooden ramp that is inclined at a 30¡ angle. The block's initial speed is 13 m/s. (Use µk = 0.20 for the coefficient of kinetic friction for wood on wood.) What vertical height does the block reach above its starting

24. ## chemistry

which element in period 4 has four electrons in its electron-dot structure ?

25. ## Economics

There are three industrial firms in Happy Vally. Initial Cost of Reducing Firm Pollution Level Pollution by 1 unit A 70 units \$20 B 80 units \$25 C 50 units \$10 The government wants to reduce pollution to 120 units, so it gives each firm 40 tradable

26. ## Chemistry

How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely?

27. ## Chemistry

What incorrect information is given by the formula MgOH2 instead of the correct formula, Mg(OH)2 ?

28. ## Science (Chemistry Periodic Table of Elements)

A tube of "Brilliant Yellow" acrylic paint contains titanium dioxide. What transition metal is in this compound? What important nonmetal elements is in this compound?

29. ## math problem

Brianna is working on her homework. Her assignment is to come up with four representations for an exponential function of her choosing. She decides it is easiest to start by writting y=1200 (1/2) ^x. Help brianna create the other three components of the

30. ## AP US History

How did Thomas Jefferson hope to remove obstacles to upward social mobility?

31. ## Math - Simple rational Function (check)

A pollutant has been leaking steadily into a river. An environmental group undertakes a clean-up of the river. The amount of pollutant in the river after t years the clean-up begins is given by the equation N(t)=0.5t+(1/(10t+1)) a) What quantity of

32. ## college chemistry

HIO3 + FeI2 + HCl --> FeCl3 + ICl (in acidic solution) Show and label the two balanced half-reactions (oxidation and reduction). Add H2Os, H+s or OH-s as needed. I just wanted to know if the answer I got is correct 2FeI2 +6HCl +Cl +HIO3-->6FeCl3 +ICl +3H20

33. ## physical

Find the magnitude of the resultant of the following two vectors: i) 50 units due east and ii) 100 units 30° north of west. the answer is 62 unit but how it come ?

34. ## physics.

The fastest recorded pitch in the MLB was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would falll .809m (2.65 ft) by the time it reached home plate, 18.3 m away (60 ft). The acceleration of gravity is 9.81 m/s^2. How fast

35. ## Chemistry

Calculate the molar solubility of BaSO4 in a solution in which [H3O+] is 2.5 M. I can almost solve this on my own. If you know the following equations: BaSO4 = Ba2+ + SO42- SO42- + H+ = HSO4- HSO4- + H+ = H2SO4 and I know [H+] = 2.5 M along with the

36. ## chem

I am trying to figure out how to calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH of 10.26, I'm not sure where to start.

37. ## Physics

When a falling meteor is at a distance above the Earth's surface of 3.34 times the Earth's radius, what is its free-fall acceleration due to the gravitational force exerted on it?

38. ## Chemistry

I need help with What is the solubility of silver oxide, Ag2O, in a solution buffered at pH 10.50? The Kc for the following equilibrium is 2.0 x 10-8. Express your answer in g/L Ag2O(s) + H2O(l) ¡ê 2Ag+ (aq) + 2OH- (aq)

39. ## chem

I am trying to figure out how to calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH of 10.26, I'm not sure where to start.

40. ## chemistry

Data: 2Ba(s) + O2(g) ¡æ 2BaO(s) ∆H¡Æ = -1107.0 KJ Ba(s) + CO2(g) + ¨ö O2(g) ¡æ BaCO3(s) ∆H¡Æ = -822.5 KJ Given the data above, calculate the ∆H¡Æ for the reaction below. BaCO3(s) ¡æ BaO(s) + CO2(g)

41. ## chemistry

Calculate the pH at which the amino group of lysine is 20% dissociated. lysine side chain pka is 10.5.

42. ## Chemistry

It says prepare a theoretical titration of 25 mL of 0.1037 M formic acid (HCOOH; pKa= 3.75) solution (diluted to 100mL volume with deionized water) by 0.0964 M solution of KOH. It asks to determine the volume of KOH solution needed to reach equivalence

43. ## physics

In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 3.9 m/s at an angle of 13.8° below the horizontal. It is released 0.65 m above the floor. What horizontal distance does the ball cover before

44. ## Biology

state one effect of an increasing level of TSH-releasing factor

45. ## physics

Two objects are connected by a light string passing over a light, frictionless pulley as in the diagram. m1 = 4.50 kg, m2 = 2.10 kg, and h = 4.30 m. The 4.50 kg object is released from rest at a point 4.30 m above the floor. Determine the speed of each

46. ## Chemistry

3) A student dissolves a 1.18g aspirin tablet in water and titrates the solution with a .265M NaOH. 22.05mL of NaOH are required to reach the equivalence point. Calculate the percentage of acetylsalicylic acid in the tablet.

47. ## Analytical Chemistry

When BaCl2-H2O (s) is dried in an oven, it loses gaseious water: BaCl2-H2O BaCl2(s) + H2O (g) enthalpy change - 63.11 kJ/mol at 25 degrees C entropy change - +148 J/(K-mol) at 25 degrees C Calculate the vapor pressure of gaseous H2O above BaCl2-H2O at

48. ## English

Idententify the sentence parts - Whose car did the parking attendant tow yesterday?

49. ## maths

a boat travel 5 miles due south and then 11 miles due east. how far is it from the starting point?

50. ## Organic Chemistry

Ooops sorry! Please rank the following compounds in DECREASING order of their reactivity toward the SN2 reaction with sodium ethoxide in ethanol. a. methyl chloride b. isopropylbromide c. t-butyliodide d. methyl iodide e. ethyl chloride I have an answer,

51. ## physics

You are given a vector in the xy plane that has a magnitude of 84.0 units and a y component of -49.0 units. Assuming the x component is known to be positive, specify the vector V which, if you add it to the original one, would give a resultant vector that

52. ## Algebra, help + check please

Find the percent, round if nessacary: 1) 3 dollar tip for a 18.70 Taxi Fare. So 3 x 18 Correct? Or how would I even solve this problem? Thanks for helping -Allyson

53. ## algebra

jill's present weight is 14 pounds less than her weight a year ago. if her weight at the time was 9/8 of her present weight, what is her present weight in pounds?

54. ## PHYSICS ---HELP!

A 3.6 m diameter merry-go-round is rotating freely with an angular velocity of 0.78 rad/s. Its total moment of inertia is 1700 kg\m^2. Four people standing on the ground, each of mass 62 kg, suddenly step onto the edge of the merry-go-round. 1. What is the

55. ## English

What is the plural form of roof? Would it be rooves?

56. ## Science (Chemisty)

Why do you never find liquid bromine in your neighborhood?

57. ## Chem

A water sample is suspected to be contaminated by iron (III) ions. How could you determine if the sample is really contaminated?

58. ## College Chemistry

1) A 25mL sample of the .265M HCI solution from the previous question is titrated with a solution of NaOH. 28.25mL of the NaOH solution is required to titrate the HCl. Calculate the molarity of the NaOH solution. 2) A 1.12g sample of an unknown monoprotic

59. ## chemistry

Use the thermochemical equations shown below to determine the enthalpy (kJ) for the reaction: H2SO3(l)=>H2S(g) + 3/2O2(g) H2SO3(l)=>H2O(l) +SO2(g) DH=62KJ SO2(g)=>S(s) + O2(g) DH=297KJ H2S(g) +1/2O2(g)=>S(s) + H2O(l) DH=-155KJ so you just add 62kj

60. ## Statistics and Probability

All printed circuit boards (PCB) that are manufactured at a certain plant are inspected. An analysis of the company’s record shows that 22% of all PCBs are flawed in some way. Of those that are flawed, 84% are reparable but the rest must be discarded. If

61. ## science

Does the world have enough resources for 8 or 10 billion people to live decent, secure, happy, fulfilling lives?

62. ## Physics

On an open-reel tape deck, the tape is being pulled past the playback head at a constant linear speed of 0.372 m/s. (a) If the radius of the film taken up so far (as shown in the upper part of the drawing) is 0.0576 m, find the angular speed of the take-up

63. ## Science (Chemisty)

The melting point of sodium is 97.8`C. Would you expect the melting point of iodine to be higher or lower?

64. ## Physics

A driver in a car traveling at a speed of 21.8m/s see a cat 101m away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 90m?

65. ## physics

When a horizontal force of 4.5 newtons acts on a block on a resistance-free surface, it produces an acceleration of 2.5 m/s squared. Suppose a second 4.0 kg block is dropped onto the first. What is the magnitude of the acceleration of the combination if

66. ## Chemistry

how many grams of potassium bromide could be recovered by evaporating 650 grams of 15 perentKBr solution to dryness...... 650 * (.15) = 97.5

67. ## physics

When Mary is 22 m from the finish line, she has a speed of 4.0 m/s and is 5.0 m behind Sally, who has a speed of 5.0 m/s. Sally thinks she has an easy win and so, during the remaining portion of the race, decelerates at a constant rate of 0.51 m/s^2 to the

68. ## calculus

the sides of an equilateral triangle are increasing at a rate of 27 in/sec. how fast is the triangles area increasing when the sides of the triangle are each 18 inches long?

69. ## physics

two student walk in the same direction along a straight path, at a constant speed one at 0.90m/s and the other at 1.90m/s assuming that they start at the same point and the same time, how much sooner does the faster student arrive at a destination 780m

70. ## math

Devon's bike has wheels that are 27 inches in diameter. After the front wheel picks up a tack, he rolls another 100 ft and stops. How far above the ground is the tack?

71. ## Chemistry

60.0 g of benzene is mixed with 135g of bromine to form bromobenzene according to the following reactionC6H6+Br2-C6H5Br+HBr which is the limiting reagent and what is the theoretical yield

73. ## Science

How would you expect a metalloid like arsenic to conduct electricity, compared to a metal?

74. ## Chemistry

how many grams of potassium bromide could be recovered by evaporating 650 grams of 15 perentKBr solution to dryness...... 650 * (.15) = 97.5 is this correct

75. ## Physics

if a car is moving around a circular track at a constant speed of 55 mi/h, is there a net force acting on the car?

76. ## accounting

On May 31, 2011, James Logan Company had a cash balance per books of \$6,781.50. The bank statement from Farmers State Bank on that date showed a balance of \$6,404.60. A comparison of the statement with the cash account revealed the following facts. The

77. ## Science

Magnesium burns quickly in flashbulbs when an electric current passes through it, providing a bright light for exposing film. Why do you suppose the inside of the bulb containing the magnesium is filled with a "noble" gas instead of air??

78. ## La Salle

How many grams of sodium chloride do you need to prepare 250 mL of a 5.00% (w/v) sodium chloride solution?

79. ## math

Use the rational zero theorem, Descartes rule of signs, and the theorem on bounds as aids in finding all real and imaginary roots to the following equation: 4x^(3)-17x^(2)+16=0

80. ## chemistry

how can AgCl(s) be dissolved completely? write an equation for the reaction

81. ## Science

Describe the procedure for preparing 250mL of buffer solution with a pH of 5.00 from acetic acid (CH3COOH) and sodium acetate. How many grams of acid do you have to mix with 3.6 grams of sodium acetate? (Given Ka for acetic acid = 1.8x10^-5)

82. ## physics

A cat chases a mouse across a 1.0 m high table. the mouse steps out og the way, and the cat slides off the table and strikes the floor 2.2 m from the edge of the table. When the cat slid off the table, what was it's speed?

83. ## Physics

a plane flying at 90 degrees and 100 ms is blown toward 180 degrees at 50 ms. What is the resultant velocity and direction?

84. ## physics

Hurricanes can involve winds in excess of 120 km/h at the outer edge. Make a crude estimate of the energy of such a hurricane, approximating it as a rigidly rotating uniform cylinder of air (density 1.3 kg/m^3) of radius 120 km and height 4.5 km. Make a

85. ## physics

The fastest recorded pitch in the MLB was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, the ball would falll .809m (2.65 ft) by the time it reached home plate, 18.3 m away (60 ft). The acceleration of gravity is 9.81 m/s^2. How fast

86. ## chemistry

A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.45 celsius to 23.65 celsius.The heat capacity of the caloimeter, excluding the water, is 2.21 kJ/degree celsius. using this

87. ## Physics

The outer edge of a truck tire that has a radius of 20cm has a velocity of 21 m/s. what is the angular velocity of the tire in rad/s?

88. ## chemistry

Suppose that the microwave radiation has a wavelength of 10.8 cm. How many photons are required to heat 225 mL of coffee from 25.0*C to 62.0*C ? Assume that the coffee has the same density, 0.997 g/mL , and specific heat capacity, 4.184 J/(gK), as water

89. ## College Physics

A 75.0 kg ladder that is 3.00 m in length is placed against a wall at an angle theta. The center of gravity of the ladder is at a point 1.20 m from the base of the ladder. The coefficient of static friction at the base of the ladder is 0.800. There is no

90. ## chemistry

is there any way to know if its products or reactants..? The equilibrium constant for the gas phase reaction N2 (g) + 3H2 (g) (2 arrows: one to right, one to left.) 2NH3 (g) is Keq = 4.34 × 10^-3 at 300°C. At equilibrium, __________. A) reactants

91. ## chemistry

The electron from a hydrogen atom drops from an excited state into the ground state. When an electron drops into a lower-energy orbital, energy is released in the form of electromagnetic radiation. Part A: How much energy does the electron have initially

92. ## physics

From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340 m/s, parallel to the ground. As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. h is 0.50 m and

93. ## figurative language

plz help me i am in 5th grade and need help on similies & metaphores about the book number the stars. it asks "it was an odd word: pride." meaning proud, i think

94. ## Statistics/Probability

in roulette, there are 18 red 18 black and 2 green slots ball rolled 25 times what is the prob that the ball does not fall into any green slots? how do you set this up? I did 1-.0536 and its wrong how to start? thanks so much!

95. ## social studies

why do you think the Union army did not accept African American volunteers first?

96. ## Chemistry

I need some help with my Limiting Reactant Experiment report sheet. There is a question asking me to write a complete formula of the limiting reactant in the salt mixture of CaC2O4 X H2O. I don't know where to begin. Could you please help me.

97. ## math

if julie takes 4 hours to type up a manuscript and pat takes 6, if they work together at 12:00, what time would they finish??

98. ## physics

A racing car, starting from rest, travels around a circular turn of radius 28.9 m. At a certain instant, the car is still accelerating, and its angular speed is 0.421 rad/s. At this time, the total acceleration (centripetal plus tangential) makes an angle

99. ## chemistry

i am calculating an unknown acid for both monoprotic and diprotic assumptions. I calculated the monoprotic by multiplying the M NaOH by the liters of NaOH used to titrate. 0.0984M x 0.02396= 0.00236. I then take the unknown sample weight and divide it by

Listed below are five procedures followed by The Beat Company. Several individuals operate the cash register using the same register drawer. A monthly bank reconciliation is prepared by someone who has no other cash responsibilities. Ellen May writes

101. ## Chemistry

Please rank the following compounds in DECREASING order of their reactivity toward the SN2 reaction with sodium ethoxide in ethanol. a. methyl chloride (CH3Cl) b. isopropylbromide ((CH3)2CHBr) c. t-butyliodide (CH3)3Cl) d. methyl iodide (CH3I) e. ethyl

102. ## Algebra

If t multiplied by the sum of x and 2y is divided by 4y, what is the result?

103. ## Science (Chemisty)

In an old "Star Trek" episode, Captain Kirk and Spock come across a life form called the Horta made mostly of silicon compounds. Based on silicon's place in the periodic table, do you think silicon compounds are a reasonable choice for an alien life form?

104. ## math

I'm in 5th grade pls. help. Amanda has a collection of X, Y and Z. Every X is a Y. One half the Z's are Y's. There are 3 times as many Y's as X's. Amanda has 50 Z's and 40 X's. No Z is an X. How many Y's does Amanda have that are neither X's nor Z's?

105. ## Physics

An arrow slows down from 43 m/s to 28 m/s as it passes through an apple. If the 493 g apple was originally at rest and sped up to 0.44 m/s, what is the mass of the arrow? Answer is 14.5 g

106. ## Biology (multiple choice!)

I'm studying for a test and can't find the answers for the following questions...please help! What clade of bacteria produce oxygen via photosynthesis? What is a synapomorphy for domain Bacteria? In a symbiotic relationship between organisms of

107. ## Chem Class

The equilibrium constant for reaction 1 is K.....? how do i figure out problems like this? do i check which ones cancel out? The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ___? (1) SO2 (g) + (1/2) O2 (g) (right and

108. ## Physics

A man measures the acceleration of an elevator using a spring balance. He fastens the scale to the roof, and suspends a mass from it. If the scale reads 98N when the elevator is at rest, and 93N when the elevator is moving, (a) what is the acceleration of

when a truck pulls a trailer the trailer and truck accelerate forward even though the action and reaction forces are the same size but are in oppsoite direction. Why don't these forces balance each other?

110. ## Chemistry

Chemical analysis of a gas shows that it contains one carbon atom for every one hydrogen atom. The densiry ofthis gas is 1.161 g/l at STP. What is the minimus oxygen volume needed at STP for the complete combustion of .500 mol of this gas?

A rectangular floor that measures 3 m by 2 m is covered by 384 square tiles. Determine side length of each tile in centimeters Thanks!

112. ## Algebra 2

Solve: 2x+y+z=-2 2x-y+3z=6 3x-5y+4z=7

113. ## MS office Acess 2007

Determining Table Fields Which should not be included as fields in a table? Choose all that apply. A - Small fields B - Region fields C - Yes/No fields D - Calculated data E - Numbered fields F - Separate name fields

114. ## :( math

Please answer!!! Robert spent 3/5 of his money on stero equipment and 1/6 of the money he had left on lunch. He left the house with \$24. How much money did Robert return with?

115. ## chemistry

The new standard for arsenate in drinking water, mandated by the Safe Drinking Water Act, requires that by January, 2006, public water supplies must contain no greater than 10 parts per billion arsenic. Assuming that this arsenic is present as arsenate

116. ## calculus

A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m higher than the bow of the boat. If the rope is pulled in at a rate of 1.4 m/s, how fast is the boat approaching the dock when it is

R wants to round 47 to the nearest ten. Which halfway number can help him? 45, because it is halfway b/w 40 & 50 or 50, because it is halfway b/w 0 & 100?

118. ## English

Can you check my paraphrase of the poem "Daffodils" by W. Wordsworth, please? Thank you very much. 1)This poem recounts (deals with, talks about?) the experience of a walk Wordsworth went for with his sister Dorothy near their home in the Lake District.

119. ## accounting

What is Dell’s strategy for success in the marketplace? Does the company rely primarily on a customer intimacy, operational excellence, or product leadership customer value proposition? What evidence supports your conclusion?

I need some help with a Chemistry crossword. The subject is transition metals and we weren't told what chapter this was in the book. Down: 30. Cinder-like particles of pellets of concentrated ore Across: 5. Term referring to substances that are attracted

121. ## Physics

A car reaches a speed of 40m/s from rest in a time of 8 seconds. After the 8 seconds, the car travels at a constant velocity fro 200meters when it runs out of gas. The car slowly comes to rest 30 seconds after running out of gas. Calculate acceleration for

122. ## Science

Magnesium burns quickly in flashbulbs when an electric current passes through it, providing a bright light for exposing film. Why do you suppose the inside of the bulb containing the magnesium is filled with a "noble" gas instead of air?? Please help!

123. ## physics.

Part 1: A ball is thrown horizontally from the top of a building 28.6 m high. The ball strikes the ground at a point 80.3 m from the base of the building. The acceleration of gravity is 9.8 m/s^2. Find the time the ball is in motion. Answer in units of s.

124. ## SITES

is cramster . com a free site ? I'm actually searching for sites that offer free homework help, gladly I found this one, but I'm wondering if there are others as well, that don't require money or an email address?

125. ## computer science

Given an equilateral triangle with different charges namely charge on A is negative 4nC; B is positive 2nC and C is 1nC. The sides are all equal with 20cm. How can you calculate the resultant field on A; the mutual potential energy of the system?

126. ## Hard Physics Problem

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 131 kgand radius R = 80 cm.The engine rotates the wheel at 580 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad

127. ## trig

Rewrite the expression in terms of the first power of the cosine. Use a graphing utility to graph both expressions to verify that both forms are the same. 5 sin6(x)

128. ## chemistry

Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C. -q = mass

129. ## Angular Velocity Question

A disk with a mass of 18 kg, a diameter of 50 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force,

130. ## Physics

A blue car pulls away from a red stop-light just after it has turned green with a constant acceleration of 0.2 m/s2. A green car arrives at the position of the stop-light 7.5 s after the light had turned green. What is the slowest constant speed which the

131. ## physics

A skier starts from rest at the top of a hill that is inclined 18.5° with respect to the horizontal. The hillside is 200 m long, and the coefficient of friction between snow and skis is μk = 0.0500. At the bottom of the hill, the snow is level and the

132. ## chemistry 101

the valve between a 3.00-L tank containing O2(g) at 6.00 atm. and a 5.00-L containing N2(g) at 1.20 atm. is opened. Calcualte the ratio of partial pressures (O2:N2) in the container?

133. ## math

Suppose 4 days before the day after tomorrow was Thursday. What day of the week was yesterday?

134. ## physics.

During a baseball game, a batter hits a pop-up to a fielder 94 m away. The acceleration of grvity is 9.8 m/s^2. If the ball remains in the air for 5.5 seconds, how high does it rise? Answer in units of m.

135. ## Chemistry

1. Chemistry is the study of the composition, structure and properties of substances.- F? 21. Which is found in the nucleus-- Protons or neutrons? 27. Copper metal is: a. poor conductors b. brittle c. malleable C? 44. What is the charge on most polyatomic

136. ## Physics

If 2.0 J of work is done in raising a 280g apple, how far is it lifted? I would say F= 2.0/180 but that doesn't really sound right...

137. ## science

A 75 kg astronaut in space pushes against a 200 kg anvil. When the astronaut lets go of the anvil while pushing it: a. both astronaut and anvil accelerate in opposite directions at the same rate b. neither the astronaut nor the anvil will accelerate since

138. ## Physics

A tennis ball of mass 57. g bounces off a wall. Right before hitting the wall, the ball is moving to the right and up with vx=+40. m/s and vy=+10. m/s. Right after bouncing off the wall, the ball is moving to the left and up with vx=-35. m/s and vy=+10.

139. ## music

i have to compare and contrast the gang stories from grease and west side story i need 5 things PLEASE HELP

140. ## Algebra

A triangle has the side lengths of 5 inches 12 inches and 15 inches every demention is multiplyed by 1/5 to form a new triangle how is the ratio of the perimeters related to the ratios corresponding sides?

141. ## Math

A fraction greater than 1/8 and less than 1/4 is in simplest form and denominator is 4 more than its numerator...what is the fraction?

142. ## Calculus

A straight driveway perpendicular to a straight highway leads to a house located one mile away. A truck travels past the house traveling 60 miles per hour. How fast is the distance between the truck and the house increasing when the truck is three miles

143. ## math

at a local grocery store, the bananas they receive are transported through three stages: from the farmer to the market, from the market to the wholesaler, and from the wholesaler to the grocery store. at each stage, the price of the bananas increases by

Some turtles live in the sea. Some turtles live in the land. Some turtles are pets and live in houses. The words below relate to different places where turtles live. Read the words. Then write the words in the groups where they belong. tank-beach-soil-heat

145. ## math car devalue

James is interested in buying a new cadillac escalade. He did some research and found out thy on average the suv will cost 40,057.07 after 2 years of the purchase, and 19,192.53 after 5years. Find a rule that shows the depreciation of the vehicle. How much

146. ## englis 3

my garden is full of water, because of yesterday"s rain.

147. ## calculus

write the equation (in slope intercept form) of the line perpendiculaer to y=-X/2+1 and tangent to g(x)=3X^5+2X-1

148. ## Chemistry

40. An element has the configuration [He]2s^2. a. Which element is it?- Beryllium b. Is it metal or nonmetal?- metal c. How many valence (or outer shell) electrons does it have?- 2 valence electrons. Is this correct? Thanks -MC

149. ## chemistry

Write net ionic equation for all the reactions that occurred with the metals. Cu(s) with Ag+ Pb(s) with Cu2+(aq) thank you

150. ## Algebra

a vehicle uses 1 tablespoon to drive 125 yards. How many miles can the vehicle travel per gallon? (Hint 256 tablespoons egual a gallon)

151. ## :(

Please answer!!! Robert spent 3/5 of his money on stero equipment and 1/6 of the money he had left on lunch. He left the house with \$24. How much money did Robert return with?

152. ## math

On May 31, 2011, James Logan Company had a cash balance per books of \$6,781.50. The bank statement from Farmers State Bank on that date showed a balance of \$6,404.60. A comparison of the statement with the cash account revealed the following facts. The

For the reation: C3H8+5 02 =3 CO2+4 H2O How many moles of C3H8 are needed to make 3.60 grams of H2O? I think the ans is 0.05 moles c3h8

154. ## social studies

what are some of the answers to this ancient egypt worksheet?

155. ## To: Aisha >> b.aide

Your post asking for answers to two Penn-Foster exams has been deleted. This is not a cheat site and we do not want such posts on the board or in our archives. http://www.pennfoster.edu/cheatpolicy.html

156. ## math

Simplify the Expressions 1) -4(3x-3) + 9(x+1)= -3x21 2) -9x(5x+4)+10(x+3)= -45x-26 x+3 3) n(1+ 10n)-n(4n-3)= 4n+6n 4) -2n(-8n-10)-6(-10n-3)= 96n - 10 5) 8(-4x-7)+3(9-9x)= 59x - 29 6) 9(3-10n)-3(10n+1)= 30n - 3 7) -4(1-8x)-9(-10x-1)= -58 - 5

157. ## social studies

what did most of the early people do to survive? what did the early people do to be friendly with the settlers that came from the west

158. ## Chemistry

Concentration of OH- left in a solution made by mixing 16.0 g of NaOH and 80.0 mL of 0.170M HNO3?

159. ## algebra

use substitution method to find x and y for 7x + 5y = -31 and -4x + y = 37

160. ## chemistry

HOw many calories of heat were produced by the reaction of 10ml water with the powder of two compartments (2x3.23 g) of the heater?

161. ## physics

Part 1: A ball is thrown horizontally from the top of a building 28.6 m high. The ball strikes the ground at a point 80.3 m from the base of the building. The acceleration of gravity is 9.8 m/s^2. Find the time the ball is in motion. Answer in units of s.

162. ## Chemistry

3. A hypothesis is a testable statement.- T 4. Weight is a measure of the quantity of matter.- F 6. Potential energy is energy of motion.- F? 7. Liquids do not have a definite shape or volume.- F 8. The ability to burn is a chemical property.- T 10.

163. ## social studies

In an attempt to make a sound vocational choice, Jared studies the Occupational Outlook Handbook. He is practicing the strategy referred to as: seeking professional help. finding occupational facts. getting firsthand experience. matching your career to

164. ## college physics

A particular grinding wheel is a uniform solid disk of radius 8cm and mass 3kg. While the wheel is spinning at 50rad/s. A tool is pressed against its rim in a way that causes a friction force of 40N. If the disk is just "coasting" when the torque is

165. ## calculus

Given two functions as: f(x) = x2-x-1 and g(x) = 3/x Find fog(x) also find the domain of f, g and fog

166. ## Statistics/Probability

in roulette, there are 18 red 18 black and 2 green slots ball rolled 25 times what is the prob that the ball does not fall into any green slots? how do you set this up? I did 1-.0536 and its wrong how to start? thanks so much!

167. ## HCA 230

what is America cultural viewpoint on health in regards to health as organic, health as harmonious, and disease as a curse or stigma?

168. ## chemistry

how many moles of sodium ions are present in 3.50 L of 0.400 M Na3PO4?

169. ## math

How do you find the rule of the sequence if the 2nd term is 40057.07 and the 5th term is 19192.53

170. ## Percent algebra help?

1.44 Tax on an item priced at 24.00? How would I solve this? I need to find the percent? Would I just divide 1.44/24.00? Thanks Allyson

171. ## maths

a ramp 10ft long is connected to the back of a truck that is 4ft off the ground. how far away from the truck does the ramp touch the ground?

172. ## Chemistry

If 22 g of water is heated so that the water temperature rises from 18.1°C to 21.5°C, how many calories have been absorbed by the water? The specific heat of water = 1.00 cal / (g · °C)

173. ## English

Can someone edit my paragraphs please? "You know, if we had a uniform policy, it would make things better in this school."(qtd. in Mitchell). The famous words of president Bill Clinton after realizing how school uniforms would positively affect our public

174. ## physics

Part 1: A long jumper leaves theground at an angle of 21.7 degrees to the horizontal and at a speed of 10.6 m/s. The acceleration of gravity is 9.8 m/s^2. How far does he jump? Answer in units of m. Part 2: What is the maximum height he reaches? Answer in

175. ## physics.

Part 1: Janet jumps off a high diving platform with a horizontal velocity of 2.67 m/s and lands in the water 2.6 seconds later. The acceleration is 9.8 m/s^2. How high is the platform? Answer in units of m. Part 2: How far from the base of the platform

176. ## Chemistry

Consider the concentration of the final solution made in two volumetric flasks. In flask A the liquid was filled to a level above the mark. In flask B the liquid was filled to a level below the mark. Describe if the final concentration of the diluted

177. ## English

1. What time do you go to bed? - I go to bed at 10 p.m. 2. When is your bed time? - It is 10 p.m. 3. What is your bed time? - It is 10 p.m. 4. What present did you receive on your birthday? 5. What did you receive on your birthday? 6. Which gift did you

178. ## physical science

A 100 kg ball of lead rests next to a 10 kg rock. Which statement below is true? a. the lead ball and the rock have equal amounts of inertia b. if the lead ball and the rock fell from the same height in a vacuum, the rock would hit the ground first because

179. ## Financing

Reflect on your experience with investing. What type of investments do you currently own/manage? What decisions are you responsible for making in regard to management of the investments? At this time, how comfortable are you with advising others on

180. ## calculus

given f(x) = sin2x/(xcosx) a) find lim f(x) x->0 B) find lim f(x) x-> pi/4

181. ## algebra

Describe two laws of exponents and provide an example illustrating each law. Explain how to simplify your expression. How do the laws work with rational exponents? Provide the class with a third expression to simplify that includes rational (fractional)

182. ## Algebra, Check help please?

42 is 200 percent of what number? So I put 42 over 100 is equal to 200 over x? Is this right? Can someone explain? Thank you -Allyson

183. ## English

I need help doing the general reference for this sentence. Clarissa's four-year-old sister brought a frog inside and let it loose, which made Clarissa shriek.

184. ## physics

A 45000 pound truck is travelling at 5 mph. It hits a stationary object that is fixed in place. What is the force exerted on the object?

186. ## Calculus

Find dy / dx by implicit differentiation. 2sin(9x)cos(3y)=3 dy/dx=_____

A fraction greater than 1/8 and less than 1/4 is in simplest form and denominator is 4 more than its numerator...what is the fraction?

188. ## ALgebra

use substitution 3x-2y=11 x-y/2=4

189. ## Physics

A disk with a mass of 13 kg, a diameter of 25 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force,

190. ## English

I have to do some ads on clothing and how do these sound? Grab it and GO....Prom dress for only \$25.99. Make Fashion your Passion and get this 30% off dress from our dress shop. Tradition Country Collection Sweaters Style for only \$23.99 each. 40 % off.

191. ## Physics

A spring has a spring constant "k" of 130 N/m. How much must this spring be compressed (in meters) to store 30 J of energy?

192. ## chemistry

Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 Using the above table, determine the final temperature if 713.6J is released from a 48.2g sample of copper initially at 93.8o C. i keep

193. ## math

find the coordinates of the centroid of a triangular metal part with vertices at A(12,18) B(18,6), and C(3,12

194. ## math

Solve the two sided inequality and show the solution on real line 7 < 1-2x ≤ 10 Given two functions as: f(x) = and g(x) = Find fog(x) also find the domain of f, g and fog Simplify, then apply the rules of limit to evaluate

195. ## calculus

given h(x) =kx+1, X and equal to 1 A) find value of k such that h(x) is continous at x=1 B) determine if h(x) is differentiable at x=1

196. ## finance

Has the buildup in plant and equipment been financed in a satisfactory manner in the kramer corporation

197. ## US History

Between 1857 and 1903, the US acquired many new territorial possessions around the globe. Why do you think so many of these new possessions were islands located in the Pacific Ocean? I need help answering this. Thanks -MC

198. ## science

How many grams of solid product can be produced by mixing 45.6 grams of chlorine gas with excess sodium metal?

199. ## how to gain your parents trust back

I told three bad lies and now my parents don't trust me any more. What should i do?

200. ## psy

Cathy owes six overdue movies to her local video store. Since each of Cathy’s overdue videos is a comedy, only comedies are currently overdue at Cathy’s local video store. Which one of the following premises, if added to the statements above, would

201. ## Math- practical purpose

For many years, China has been the world's most populous country. However, India has been catching up, with 1132 million in mid-2007 and growing at 1.6% per year, versus China then with 1318 million and growing at only 0.6% per year. If these rates

202. ## Programming

This is a visual basics program issue. The problem is: Table 4.7 contains information on several states. Write a program that requests a state and category (flower, motto and nickname) as input and displays the requested information. If the state or

203. ## Physics

In Fig. 4-11, a ball is launched with a velocity of 7.50 m/s, at an angle of 50° to the horizontal. The launch point is at the base of a ramp of horizontal length d1 = 4.00 m and height d2 = 3.60 m. A plateau is located at the top of the ramp. What is the

204. ## physics

A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg

205. ## Ap Chemistry.

Zn + 2HCl -> ZnCl2 + H2 If 7.29 g of Zinc reacted, how many liters of HCl were used? I know that i can't use mass volume conversion, because the HCl is not a gas...so what do i do?

On May 31, 2011, James Logan Company had a cash balance per books of \$6,781.50. The bank statement from Farmers State Bank on that date showed a balance of \$6,404.60. A comparison of the statement with the cash account revealed the following facts. The

207. ## math(new)

i need a diagram to show me this new math and how it works. i am not understanding the concept

208. ## Math

1. -3/4*-(1 5/6)*(-7/4)= 2. -3/4*(-1 5/6)*7/4= 3. -3/4*(-1 5/6)*(-7/4)*(-2 3/8)= 4. 3/4*(- 5/6)*7/4*(-2 3/8)= 5. 3/4*1 5/6*7/4*(-2 3/8)=

Could someone explain what does it mean to "stabilize international exchange rates"? I would really appreciate it if someone wrote a brief explanation, because I just don't understand

211. ## english

How can I fix this sentence? I have been busy of doing my homework every Thursday, and I only have two hours of sleep every Thursday.

212. ## chem

Give the general formula for any dialkene; that is, a straight-chain hydrocarbon with two double bonds along the chain. (Type your answer using the format CnHn+1 for CnHn+1.)

213. ## math

This pattern represents the SQUARE NUMBERS: 1,4,9,16,25,36...draw a picture or diagram to explain SQUARE NUMBERS.

214. ## Chemistry

23. Ductility is the ability to be hammered into sheets.- F? 25. A monatomic ion contains only one atom.- T 26. Iron (II) means the iron would have an oxidation number of +2.- F? 27. A polyatomic ion is a group of atoms acting as a single ion.- T 30. The

215. ## calculus

Find all critical numbers: 2x*sqrt(3x^2+4)?

216. ## calculus

Solve the two sided inequality and show the solution on real line 7 < 1-2x ≤ 10

217. ## health care

If an enrollee uses more services thatn originally assumed per the PPPM calculation, then the plan would a. show a profit for that period b. show a loss for that period c. need a contract renegotiation d. require that the enrollee be dropped from the plan

218. ## English

Are you doing any volunteer work? How about your friends? 1. Yes, I am. They are doing volunteer work, too. 2. Yes, I do. They do volunteer work, too. (Which answer is right?)

219. ## Biology 101

Summarize the inheritance of sex-linked traits through meiosis and how it relates to genetics.

220. ## biology 101

Produce a family tree for at least three generations of your family or a friend’s family following these genetic traits: Eye color Hair color Dominant hand Height Widow’s peak Hitchicker’s thumb A family genetic disorder Can't seem to start could you

221. ## Chem

How can i determine that the volume is decreasing? Of the following equilibria, only ??? will shift to the left in response to a decrease in volume. A) 2HI (g) H2 (g) + I2 (g) B) N2 (g) + 3 H2 (g) 2 NH3 (g) C) 4 Fe (s) + 3 O2 (g) 2 Fe2O3 (s) D) 2 SO3(g) 2

222. ## Biology (multiple choice!)

What’s one advantage to being eukaryotic rather than prokaryotic? What’s one advantage to being prokaryotic rather than eukaryotic?

223. ## human resources

the four steps an organization should take to change its personality profile. What should the organization consider before developing such a plan?

224. ## math

find the coordinates of the centroid of a triangular metal part with vertices at A(12,18) B(18,6), and C(3,12)

225. ## math

How do I take the derivative in respect to c1 for the following utility function? u1 = log(c1) + log [1/2(x-c1-c2)] details please

226. ## math

Mr. Samuel has a 150 pennies in two jars there are 40 more pennies in one jar than the other, how many pennies are in each jar

227. ## algebra

solve this two sided inequality 7

228. ## history

how do you think the Emancipation proclamation will affect people’s attitudes towards the war?

229. ## algebra

If i have the cost per quart of vinegar and the % of acetic acid for each of 4 brands, what would be an equation i could use to find out which brand has the most acetic acid for the money?

230. ## Math - Simple rational Function (check)

Consider the function f(x) = x/(x-1) Are there any turning points? Explain how this could help you graph f(x) for large values of x? Ans: turning points is another word for checking the concavity, and therefore i find the second derivative and equate it to

231. ## Math

Mark's checking account is overdrawn by \$35. How much does he need to deposit to have a balance of \$100?

232. ## Algebra

if x-4 is 2 greater than y+1, then by how much is x+6 greater than y?

233. ## Physics

A heavy freight train has a mass of 14000 metric tons. If the locomotive can pull with a force of 645000 N, how long does it take to increase it's speed from 0 to 69.8 km/h?

234. ## Spelling!

I have a hard home work with spelling. i have to write sentences using each word. It doesn't sound so hard right?? The words are : Spelling List-Possessives anybody's brother's brothers' companion's companions' lions' president's presidents' teenager's

235. ## Chemistry

42. List 2 things a chemical formula indicates about a compound: -It indicates the elements present in the compound. -The relative amount of each compound. Are those correct? 44. What element do most of the polyatomic ions contain? Thanks -MC

236. ## 4th grade math input output tables

input x 1 2 4 5 6 8 9 output Y 7 9 13 _ _ _ _

237. ## Percents and Porporitons help? ( Algebra) Check?

What percent of 120 is 66? So on my paper.. I wrote 120 out of 100, because all percents add up to be 100 percent. And then I wrote = 66 over x. Is this correct? and then I would do the butterfly method? ( Cross Multiply) Thank you! -Allyson

238. ## Physics

Horizontal velocity: 138ft/s Vertical velocity: 109ft/3 A ball is thrown at 95 mi/h. The distance from the mound to the plate is 60.5 ft. Assuming the ball is pitched parallel to the ground, how far does it fall due to gravity by the time it reaches the

239. ## Algebra

a vehicle uses 1 tablespoon to drive 125 yards. How many miles can the vehicle travel per mile?

240. ## maths

paul is paid \$5 per hour. one day paul works for 4 hours 15 minutes. calculate his total pay.

241. ## math

input x 1 2 4 5 6 8 9 output Y 7 9 13 _ _ _ _ I have tried all ways add 6 plus 1 x4 plus 1 add 7 nothing works

242. ## Pre Cal

What is the inverse of g(x)= 1/2(x-1)^3-4

243. ## math

3a2 - (3a - x + b)

244. ## Math for Liberal Arts

Consider a test for illegal drugs that is 98% accurate. Lets test 3000 poeple, 2900 of whom do not use illegal drugs. What percent of the total positive tests were false? What is the chance of a person testing falsely positive twice in a row?

245. ## math

(2x4 + 3x3 - 4) + (3x4 - 2x3 - 8)

246. ## english

Some turtles live in the sea. Some turtles live in the land. Some turtles are pets and live in houses. The words below relate to different places where turtles live. Read the words. Then write the words in the groups where they belong. tank-beach-soil-heat

248. ## math

Part 1: A long jumper leaves theground at an angle of 21.7 degrees to the horizontal and at a speed of 10.6 m/s. The acceleration of gravity is 9.8 m/s^2. How far does he jump? Answer in units of m. Part 2: What is the maximum height he reaches? Answer in

249. ## Science

What is the power of 1,000 newtons, 3 meters and 60 seconds?

250. ## biology

What’s one advantage to being eukaryotic rather than prokaryotic? What’s one advantage to being prokaryotic rather than eukaryotic?

251. ## English

I have to do some ads on clothing and how do these sound? Grab it and GO....Prom dress for only \$25.99. Make Fashion your Passion and get this 30% off dress from our dress shop. Tradition Country Collection Sweaters Style for only \$23.99 each. 40 % off.

252. ## biochemistry

calculate the isoelectric point of each of the following amino acids: glutamic acid, serine, histidine, lysine, tyrosine, and arginine

253. ## chemistry

how many moles of nitrate ions are in 10.00 grams of copper(II) nitrate?".

254. ## MATH

how to add or subtract fractions with unlike denominators and give me some examples so i could understand. thank you.

255. ## chemistry

which of the following must be known precisely for the specific heat to be accurate. Answer a. the mass of the water in the calorimeter b. the temperature of the metal shot before it is immersed in the boiling water c. the mass of the boiling water

256. ## Statistics

Suppose that the probability is 1 in 3,900,000 that a single auto trip in the United States will result in the death of the driver. Over a lifetime, an average U.S. driver takes 50,000 trips. Assume that events are independent: (a) What is the probability

257. ## Physics - Archery String

An archery string has a spring constant of 1.9*10^2N/m. By how much does its elastic potential energy increase if is stretched 5.0cm

258. ## Math

if a guy tavels 36 miles in 12 hours and his friend travels in a bike half the time how much would he travel in 9 hours

259. ## Media Studies

Hi, I am writing an essay for my media studies class on the topic; Has digital technology made professional journalists obsolete? What is the role of journalism in a digital society? Can anyone give me ideas for arguments I can come up with or evidence.

260. ## Nizwa

What is dry ice? How do you convert it to its original form? Mention the name of the process involved. What happens to the energy of the matter during this process?

261. ## \$th Grade Math input output tables

Input x 2 Output y 9 how do you get 9?

262. ## us history

Who was the leader of the Church of Enland?

263. ## science

A 75 kg person and a 200 kg crate are each parachuted to earth from a plane. Which statement is correct? a. the crate will reach terminal velocity last, but hit the ground first b. the person will reach terminal velocity last, but hit the ground first. c.

264. ## healthcare

What are some motivational methods for healthcare?

265. ## English

How should I pronounce "Nasrredin"? This is a person's name.

What sea animal you get when you unscramble the letters gsntoe

267. ## Physics

A heavy freight train has a mass of 14000 metric tons. If the locomotive can pull with a force of 645000 N, how long does it take to increase it's speed from 0 to 69.8 km/h?

268. ## math

11 over 24 times x equals 68 over 24

269. ## Chemistry

What is the percent aluminum in a sample weighing 1.85 grams. If 35 mL of wet hydrogen gas was produced @ 24 degrees Celsius under a total pressure of 752 torr?

270. ## mgt 415

What are the benefits to the employees, customers and management for using high performance teams?

271. ## Physical Science

A pendulum has 343 J of kinetic energy at the lowest point in its swing. At the highest point in its swing, it has a height of 5 m. What is the pendulum's mass?

272. ## US History: FDR

I don't understand what the problem was with international relations during the Great Depression when Franklin Roosevelt was president. something about exchange-rate stabilization. That FDR refused to take part in. Mainly, I don't know what the problem was

273. ## Good Sites

I'm actually searching for sites that offer free homework help, gladly I found this one, but I'm wondering if there are others as well, that don't require money or an email address?

274. ## english

does this make sense? Figure 1. Protein Analysis - Determination of the protein concentration of casein in an unknown sample after the addition of the biuret reagent from the results over test tubes 1 to 5.

275. ## Chemistry

How do I convert 0.67275 M of acetic acid solution to V/V %?

276. ## Math

a side of a square is 10 meters longer than the side of a equalaterial triangle. The perimeter of the square is 3 times the perimter of the triangle

277. ## geometry

dteremine the probibility of drawing a white ball from a bag containing 7 blue, 5 green and 6 white balls

278. ## Science

For a constant temperature, the water content of an air mass is 0.15 mg/l. If the saturation of air at that temperature is 0.50 mg/l, then the relative humidity is Fill in the Blank 01%. (Note: the answer to this question is a number.)

279. ## Pure math

1.Using your calculator,solve 4 ø in each of de 4lowing equations correct 2 1 decimal place,and with de restriction that 0 degree lessthanequals ø lessthanequals 90 degree

280. ## english

name a breakfast food that begins with the letter k also the letter a

281. ## English

I forgot to include the following sentences. I really hope you can have a look at them. 1)The daffodils are described not as static like in a painting but as alive with motion. 2) Actually, they are fluttering and dancing in the breeze, and tossing their

282. ## chemistry

what is the structure of histidine, arginine, tryptophan, proline and tyrosine at pH 4?

283. ## Math

Using only the numbers 1-8 without repeating any of them, what is _+_=_-_=_-_=_-_=_? And the last number has to be the same as the first cause it's in a circle don't forget!!

284. ## Criminology

I have described normative and legal definitions of crime but how is each for applied?

285. ## Algebra 2

Solve: 4a+9b=8 8a+6c=-1 6b+6c=-1

286. ## Probability

Suppose that the probability is 1 in 3,900,000 that a single auto trip in the United States will result in the death of the driver. Over a lifetime, an average U.S. driver takes 50,000 trips. Assume that events are independent: (a) What is the probability

287. ## calculus

Find all critical numbers: x^(1/3)-x^(-2/3)?

288. ## space

Stars near the ______ should show the greatest Doppler shifts due to the earth's revolution. Why? Would it be stars near the ecliptic because it deals with the earth revolving and having motion.

289. ## math - check plz

She has 2 to the 10th power of fruit flies in each of 2 to the 2nd power. How many fruit flies does she have in all? (answer as power) 2to the 11th power?

290. ## Paragraph, find error in paragraph

A lot of people have wills. Everyone needs a will, but not all people have one. Wills are important because they explain who gets your stuff after you die. You don't want your things going to someone you don't want to get it. My Aunt Martha went to a

291. ## math

11 over 24 times x equals 68 over 24

292. ## English

I have one more to check. Restaurants and shops line the banks of the Thomas River in London. line=intransitive

293. ## us history

What where some Reasons to Oppose the Emancipation Proclamation?

294. ## math inequalities please check

A landscape designer has to design a rectangular pad of concrete at the centre of a rock garden. The length must be less than or equal to twice the width; the perimeter must be less than or equal to 40 m; and the area must be greater than or equal to 60

295. ## Global Issues (ms.sue)

Here is the brief outline that I created. Outline: Intro: make my position (Pro side of the topic) 1st point: I think richer countries should take care of poorer countries because they have the resources and the ability to do so and they should use it to

296. ## MGT415

Describe the conditions necessary to create a HPT environment.

What is the different between reptiles and amphibians?

298. ## Algebra check+help?

What percent of 225 is 99? So then I wrote out 225 Over X and then I wrote = To 99/100? Is that what you would do? Because if you add up all percents, you should always get 100? Could someone correct me and help me get the right answer? THANK YOU! -Allyson

299. ## health care marketing

describe three key ideas or concepts you have learned regarding marketing strategies in health care.

300. ## Social Studies

In what way is a state different from a country?

for -2 < x < +3 and f(x) = 3x^2 - 6x a)determine the domain and range of f(x) b) the eqn of f inverse if f(x) is further restricted to 1 < x < 3. i don't know how to these problems i tried everything please help me

302. ## Pure math

1.Using your calculator,solve 4 ø in each of de 4lowing equations correct 2 1 decimal place,and with de restriction that 0 degree lessthanequals ø lessthanequals 90 degree

303. ## math inequalities please check

A landscape designer has to design a rectangular pad of concrete at the centre of a rock garden. The lenght must be less than or equal to twice the width; the perimeter must be less than or equal to 40 m; and the area must be greater than or equal to 60

304. ## physics

How long would it take for the Earth to complete a full turn if a person at 56.4° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,385 km for the radius of Earth.

305. ## science

you have a liquid with a volume of 13mL and a mass of 19.5g.what is the density of the liquid?

306. ## social studies

What was the substance usd to stuff the nostrils?

307. ## algebra

I get confused when solving for some of the fractions in my problem. how would you solve for 1+(-2/(sqroot 5))? I just need a refresher on the order of operations for it. Thanks!

308. ## Social Studies

What was the stubstance used to stuff the nostrils?

309. ## math

liza has three hundred seventen coins in her collection. Tamca has found five hundred eighty-one coins in her collection. Tamca has how many more coins then liza?

310. ## History

I don't understand what the problem was with international relations during the Great Depression when Franklin Roosevelt was president. something about exchange-rate stabilization. That FDR refused to take part in. Mainly, I don't know what the problem was

311. ## HS Physics

Two people start at the same place and walk around a circular lake in opposite directions. One walks with an angular speed of 1.10 10-3 rad/s, while the other has an angular speed of 3.90 10-3 rad/s. How long will it be before they meet? I can NOT figure

312. ## algabra 1

The following figure has a length of 5 and a width of 9. What is the area of the figure?

313. ## English

Can you please check these sentences on Wordsworth's life, please? 1)William Wordsworth was born in Cumberland in the English Lake District, which was to become his main source of inspiration. 2)He was enthusiastic about the democratic ideals fostered by

314. ## math

EXPLAIN THE IMPORTANCE OF THE CENTROID IN DESIGN AND MANUFACTURING

315. ## Math

If x+y is 4 more than x-y, which of the following statements are true? I. x=2 II.y=2 III.xy has more than one value

316. ## english

How do I fix this sentence? As the beat of the song went up, we screamed loudly in order to match the beat.

317. ## math

Can some one please help me I had developed jello brain today. Can some one explain to me why the line x = - 2 is avertical line. and what the slope would be for the line. and why its diffenrence for y = -2 . what would the slope be for y = -2. Please I am

318. ## Media Studies

Hi I posted my essay topic earlier; but could anyone give me some ideas of the role of journalism in the digital society?

319. ## Senator

Can you help me write a speech to become the high school senator? i need to get a good one that really hooks the kids.

320. ## English

Can you tell me if these are correct? I have to tell if the verb is transitive or intransitive. 1. Charles Dickens described the slums of London in his novels. 2. Terrible slums and poverty existed along the riverbanks. 3. In ancient times, traders from

321. ## Health economics

indicate at which point flat-of-the-curve medicine is experienced in the following example (image that anitbiotics have been prescribed for a given population of 1,000 elderly person

322. ## MAth

If x = log28, what is x?

323. ## math

What is log2.135?

324. ## Environmental Science

How is fresh water used in industry?

325. ## US History: FDR

"...nation's impulse to inflate had been the gold standard, under which inflating prices attracted imports, which were paid for in gold shipments, thus ... depressing prices, nipping the inflationary cycle in the bud." I don't get what this means.

326. ## healthcare

what are some motivational methods for healthcare?

327. ## Business Computer Information Systems

is this appropriate for workplace e-mails and i was wondering if you could help me punctuate it correctly Hi I wanted to let you know that i'm going to be a late for work on October the 28th because of a personal reason

328. ## college

Pojman argues that we should strive to form a world in which "the virtuous are rewarded and the vicious punished in proportion to their relative deserts." Do you agree with Pojman that we deserve what we earn, or do you see problems with his stance? Form a

329. ## physics

A heavy freight train has a mass of 14000 metric tons. If the locomotive can pull with a force of 645000 N, how long does it take to increase it's speed from 0 to 69.8 km/h?

Describe the properties of a round and bumpy shaped object. What tool can be used to observe the object in more detail?

331. ## math

Simplify the Expressions 1) -4(3x-3) + 9(x+1)

332. ## math

u - 1/12 = -3/4 u=?

333. ## Social Studies

Mummification Process

334. ## English

I did a few ads on clothing. Here are some more I've come up with. Yet, I still don't find them to be so sophisticated and cool. Could I please seek some assistance? Put on a fresh new look back to school with our deluze Liz Claiborne. 35% off. Renew your

why do teachers give us esay projects and make it seem harder than it is when it really is not neccessary?

336. ## English

How do I write my essay in third person? Just want some examples. Thanks!

337. ## social studies

What countries and regions became part of the Persian Empire? My answer from readings is----- Mesopatamia, Asia Minor, Syria, Canaan, and the Phoenecian cities, Egypt,Western India, and Thrace. Are these correct?

338. ## Mat/116 Algebra

Hello I'm having some difficulities learning about the graphing, slopes, and equations, can you please help me with this: The price of an amusement park ticket is greather than or equal to \$29 The inquality is? find the slope x+2y=4 A. M= B. or undefined

339. ## maths

juan had \$3000 in his savings account. a year later, he had \$4000 because interest accured on his savings. find the percent increase.

340. ## Physics

A heavy freight train has a mass of 14000 metric tons. If the locomotive can pull with a force of 645000 N, how long does it take to increase it's speed from 0 to 69.8 km/h?

341. ## math

Correct or ot correct? -1 3/4 y = 12 y= 6 6/7? I don't think so

342. ## english

Can someone help me fix this sentence? This sleep was my first time that I ever had a long, good nap of October month.

14-9/8=x

344. ## English

How can I fix this? The most important thing was that yoga helped me fall asleep faster and improved my sleep quality.

345. ## english

How do fix these two sentences below: 1. Stretching helped me increase my muscle strength and relieving tension on tight strained muscles, which I often used during my stress moment 2. Eating two cups of ice-cream every night is my habit because it has

346. ## math

EXPLAIN THE IMPORTANCE OF THE CENTROID IN DESIGN AND MANUFACTURING

347. ## Biology 101

How are meiosis and genetics related?

348. ## Psychology

Describe in detail the two methods of language acquisition.

349. ## I forgot to bring my homework home!!

What should I do??

351. ## algebra

use substitution x/3-y=3 2x+y=25

352. ## biology

what is a close and permanent relationship between 2 different organisms ?

353. ## math

y - 1 3/4 = -3 1/2

6y+42=4y

355. ## Algebra Percent ( Check + Help)?

What number is 60 percent of 85? So I wrote out on my paper.. 60 Over 100= x over 85 would I then cross multiply? Thankks for your help! - Allyson

356. ## healthcare

can anyone help me with my healthcare question below ??????? thanks

357. ## college algebra

factor 256x2-81y2

358. ## math correct or not correct

-25/32 g = 5/8 does g= - 4/5?

359. ## ms. sue

ms. sue i had to make more ads but this time on clothing. have i made mine seem powerful?

360. ## English

What wrong with this sentence? run on? fragment? How can I fix it? Thanks! Lots of public schools are adopting the idea of wearing school uniforms in the belief that they will help improve the overall conduct and academics of their students.

361. ## math

89 more than170 =