# Questions Asked onJune 16, 2014

1. ## Statistics

One of the questions in the Pew Internet & American Life Project asked adults if they used the Internet, at least occasionally. The results showed that 454 out of 478 adults aged 18 - 29 answered yes; 741 out of 833 adults aged 30 – 49 answered yes; 1058

2. ## Physics

Josh starts his sled at the top of a 3.0m high hill that has a constant slope of 25 degrees. After reaching the bottom, he slides across a horizontal patch of snow. The hill is frictionless but the coefficient of kinetic friction between his sled and the

3. ## math

A bottle of water costs \$1.50. Explain how you would make a graph of four ordered pairs to model the total cost of the water in terms of the number of bottles.

4. ## physics

An 80 kg stuntman jumps from the top of a building 23 m above a catching net. Assuming that air resistance exerts a 100 N force on the stuntman as he falls, determine his velocity just before he hits the net.

5. ## pseudocode app

Write the pseudocode for an application that allows a user to enter the price of an item and computes 8 percent sales tax on the item and prints out for the user the original price and the tax but not the total.

6. ## chemistry

Cobalt(2) chloride is commonly obtained from chemical supply houses as a hydrate with the formula COCL2*6H2O an analysis showed that 25.0 g of this hydrate contains 11.3 g of water what is the percent water by weight in this hydrate?'

7. ## Chemistry

What volume of 0.109 M nitric acid is required to neutralise 2.50g barium hydroxide?

8. ## Arithmetic

The first, second and third terms of a geometric progression are 2k+3, k+6 and k, respectively. Given that all the terms of geometric progression are positive, calculate (a) the value of the constant k (b) the sum to infinity of the progression.

9. ## algebra 2

The height of an arrow shot in the air is given by the function h(t)=-16t^2+144t+24, where h(t) represents the height in feet, and t represents the time in seconds. what is the maximum height of the arrow? how long does it take to reach the maximum height?

10. ## physics

Which one of the following statements about standing waves on a string is FALSE? Select one: a. All other frequencies are integer multiples of the first harmonic b. The first harmonic is the lowest frequency standing wave that can be formed. c. The first

11. ## math

find the height in feet of a ball after 6 seconds in the air. after one second the ball is 148 feet in the air; after 2 seconds it is 272 feet in the air

12. ## Math

A spinner with 10 equal sections, numbered 1 to 10, is spun. Then a coin is flipped. What is the probability that the spinner will land on 3 and the coin will land on heads?

13. ## English

Which one of the following statements about making your writing fun to read is not correct? A. The conversation you write must sound natural for the characters. B. An anecdote or humorous quotation is often more convincing than a strong argument. C. Direct

14. ## Chemistry

Ramesh took two beakers A and B containing hot water and cold water respectively . In each beaker he dropped a crystal of copper sulphate . He kept it undisturbed. After some time what did he observe ? Why ?

15. ## physics

Which one of these statements regarding standing waves on a string is FALSE Select one: a. The frequency of the first harmonic depends on the tension in the string b. The frequency of the first harmonic depends on the speed of the wave c. The frequency

16. ## English

1. I am busy studying for the mid-term exam. 2. I am busy studying for the midterm exam. 3. I am busy studying for the mid-term exams. 4. I am busy studying for the mid-term exams. (Here in our country, During the period of the mid-term exam(s), students

17. ## Calculus

dy/dx = 4ye^(5x) a) Separate the differential equation, then integrate both sides. b) Write the general solution as a function y(x). For the second part, I got y(x)=e^((5e^(5x))/(5)) + C but I don't understand how to separate differential equations and/or

18. ## Physics

An airplane takes off at 9:00 A.M. and flies at 300. km/h until 1:00 P.M. At 1:00 P.M. its speed is increased to 400. km/h, and it maintains this speed until it lands at 3:30 P.M. What is the airplane’s average speed for the entire flight?

19. ## physics

a copper wire has a diameter of o.5mm and resistivity of 1.6*10power 6 ohm cm.calculate the length of wire which will be necessary to make 10 ohm coil

20. ## Dela ray Mkhatshwa j.s.s

construct kite ABCD with side AB=6CM AND BC=9CM AND ANGLE BAC=60

21. ## Physics

A high diver of mass 70 kg jumps off a diving board and enters the water with the speed of 10 m/s the average upward resistance force of water exerts on the diver is 200 N. How far in the water will the diver travel before coming to rest?

22. ## Chemistry

Determine the mass of carbon dioxide that will be formed when 131.0 g of propane (C3H8) is reacted with 32 g of oxygen (O2) C3H8 + 5O2 --> 3CO2 + 4H2O I got O2 as my limiting reagent. Then I used the mol of that which is 1 mol to find the mol of CO2 which

23. ## Science (Chemistry)

4. A Beer’s Law plot was prepared for the reaction A(aq) + B(aq) AB(aq), plotting absorption over AB(aq) concentration. The linear equation for this plot was y = 78.3x. A solution was prepared by mixing 10.0mL of 0.100M A with 5.00mL of 0.100M B and

a mass is thrown vertically upwards with an initial velocity of 30m/s. a second mass is dropped 0.5s later from directly above a height of 60m from the first mass. when do they meet and at what height?

25. ## college physics

"The Magnitude of the buoyant force is equal to the weight of fluid displaced” is a statement of which principle in the study of fluids? Select one: a. Pascal's Principle b. Archimedes' Principle c. Bernouilli’s Principle d. The Equation of Continuity

26. ## General Physics 1

1) A car moving with an initial velocity of 29.6 m/s decreases to a velocity of 17.9 m/s over a time interval of 4.08 seconds. (a.) What is the average acceleration of the car during this time? (b.) Assuming the acceleration is constant, how far did the

27. ## Geometry

How do you find the altitudes of a right triangle with the three sides?

28. ## Physics

Sled accelerates at 2m/s^2. If net force is tripled and mass is doubled then what is the new acceleration of the sled?

29. ## physics

A 5kg crate falls from height of 2 m into an industrial spring scale. When the crate comes to rest the compression of the spring is 25 cm what is the spring constant?

30. ## statistics for health research

1.A study is conducted to determine the factors that affect the increased maternal mortality rates in Kenya. Establish the variables (at least 5 variables) that you would use to conduct the study. State your expected results and explain how you will apply

31. ## math

Becky works 40 hours each week and makes \$320. How much does she make per hour? Use a number line to solve this problem. I have a number line is labeled 0-320 but I cant seem to figure this one out.

32. ## english

What is the name of the common error in the following sentence? Having risen because of the rains, the hikers were unable to cross the river. A. Run-on sentence B. Infinitive phrase C. Prepositional phrase D. Dangling modifier correct C. PrepositioNal

33. ## Strayer University

An urn contains white balls and red balls. If Juan chooses balls at random from the urn, what is the probability that he will select white balls and red balls? Round your answer to decimal places

34. ## Science

A 50-kg object moving at 12 m/s has a momentum of 600 kg ´ g m/s. What is the mass of an object, moving at 4 m/s that has the same momentum?

35. ## maths

could someone help please, on how to rewrite this expression as a power of the given number- 1/32=2^? i don't get what to do?? :s

36. ## Calculus

Q: If y=sinx/(1+tanx), find value of x not greater than pi, corresponding to maxima or minima value of y. I have proceeded thus- Equating dy/dx=0 we get{ (1+tanx)cosx-sinx.sec^2 x}/(1+tanx)^2=0……..(A) Or cosx+sinx=sinx.sec^2 x or cosx= sinx.sec^2-sinx

37. ## days care

Of the following, the newest organization to accredit afterschool programs is the A. National Association for Sport and Physical Education. B. Council on Accreditation. C. National Afterschool Association. D. National Council for Accreditation of Teacher

38. ## Math: Trig

What is Arcsec(-2) equal to and how can you find the correct answer? I got 2pi/3 but it was marked wrong on my test and I'm not sure why it's wrong. Can you please explain this to me? Thanks!

39. ## Physics

Two Kids pull opposite directions on a toy with a mass of 18kg. One exerts a force of 695N and the other 135N. Both pull horizontally and friction is void. Calculate the new force in N?

40. ## Stats

The following data represent the number of live births in the United States in 2007 for women 15 to 49 years old. Age Live Births 15 - 19 445,045 20 - 24 1,082,837 25 - 29 1,208,405 30 - 34 962,179 35 - 39 499,916 40 - 44 105,071 45 - 49 7,349 Find the

41. ## English

Which statement is most accurate regarding the speaking-writing connection? A. The words used by writers are not normally used in speaking. B. To own a word, speak it. C. Written words seldom reflect the words people use when they speak. D. To own a word,

42. ## algebra

computer manufacturing company would like to come up with a new laptop computer such that its monitor is 80 a square inches smaller than the present ones. Suppose the length of the monitor of the larger computer is 5 inches longer than its width and the

43. ## Finance

One of Wildcat's competitors has a total assets turnover equal to 2.0, a return on equity equal to 15%, and a debt ratio equal to 60%. The company is financed with debt and common stock. What is this company's Return on Assets and Net Profit Margin?

44. ## Geometry

quadrilateral A B C D on a graph. Point A is at ( -5, -1), Point B is at ( 6, 1), Point C is at (4, -3), Point D is at (-7, -5). Prove the quadrilateral is a parallelogram by using Theorem 5-8; if one pair of opposite sides of a quadrilateral is both

45. ## english grammar

a brief note on amplification "no pain no gain"

46. ## algebra

Solve the system of equations. 9x + y = 2 –4x – y = –17 I don't understand how you solve this.

Hi can someone check my answer. I'm not sure why the computer keeps marking it wrong. **Suppose a random sample of size 50 is selected from a population with σ = 10. Find the value of the standard error of the mean in each of the following cases (use the

48. ## Economics

Purely competitive firms increase total revenue by a. increasing production b. decreasing production c. increasing price d. decreasing price

49. ## Physics

a motor lifts a 12 kg mass to a height of 15 meters at a content velocity in 3.5 seconds. a) find the power b) if the motor is only 35% efficient find the input energy

50. ## chemistry

If i have 12 grams of potassium chlorate dissolved in 100g of water at 65 celsius how much would i need to make the solution saturated

51. ## projectile motion

A missile is fired upwards from the top of a cliff in a direction making an angle (not known ) with the horizontal. After 20seconds the projectile hits the ground at a point which is 1800metre from the foot of the tower of height 160metres. Find the angle

52. ## Geometry

quadrilateral A B C D on a graph. Point A is at ( -5, -1), Point B is at ( 6, 1), Point C is at (4, -3), Point D is at (-7, -5). Prove the quadrilateral is a parallelogram by using Theorem 5-7; if the diagonals of a quadrilateral bisect each other, then it

53. ## statistics for health research

the income of a group of 10,000 health system employees was found to be normally distributed with a mean=750 pm and standard deviation=50. show that of this group about 95% had income exceeding 668 and only 5% had income exceeding 832

54. ## writing

Choose the connective that belongs in the blank in the following sentence. Everyone appeared to be having a good time. _______, my impressions may have been wrong. A.In other words B.Furthermore C. Of course D. In fact CA. C. Of course

55. ## physics

The Bernouilli equation is a statement of which physical principle? Select one: a. COnservation of Momentum b. Newton's Second Law c. Pascal's Principle d. Conservation of Energy

56. ## sun shine high shcool

during the reaction the temperature of 50cm of solution tell by 10centigrade, how much energy did the reaction take in?

57. ## history

After the election of 1890, organized groups supporting farmers called for the formation of a third party that became generally known as the _______ Party.

58. ## Physics

An antitank weapons fires a 3.5 rocket, which acquires a speed of 70 m/s after traveling 90cm down a launching tube. Find the net force during lonch?

59. ## Economics

Suppose that a firm determines that its marginal revenue is greater than its marginal cost, it would better to

60. ## Physics

A motorist drives for 150 km from City A to City B in 2.5 hr. He makes the return trip in 2.0 hr. Find (a) the average speed for each half of the trip, (b) the average velocity for each half of the trip, (c) the average speed of the entire trip, and (d)

61. ## maths

If sin(theta)=3/5 , tan(phi)= 1/2 and 90¡ã< theta

62. ## Algebra

What is the solution to the system of equations that contains –3x + y = 3 and 2x – y = –1? A. no solution B. (–1, 3) C. infinite number of solutions D. (–2, –3)

63. ## physics

A mass of 2.9 g is hanging underneath a spring which has an unknown spring constant. The period of oscillation is 5.5 seconds. Find the spring constant in N/m. Give your answer to 2 s.f.

64. ## geography

Which of the following is not a way that the Four Modernizations program led to industrial development in China?

65. ## math

limim bought 2.5 metres of cloth.Each dress used 3/4 metres. If she made 3 dresses, how much cloth was left.

66. ## ineering mechanics

IF THE COEFFICIENT OF ROLLING RESISTENCE OF A CYLINDER OF RADIUS R=1FT ROLL FROM UNIFORM VELOCITY?

67. ## Math

Find the equation of a line which passes through point P(10, 12) and // to y=x/2 + 4

68. ## English

1. Mom cooked various kinds of food. 2. Mom cooked various kinds of foods. (Which one is grammatical, 'food' or 'foods'?) 3. I have a lot of interest in music. 4. I have a lot of interests in music. (Which one is grammatical?) Q5: Are spaghetti and

69. ## Math

Simplify: sin60/tan30

70. ## Physics

A 66.2 kg person sits on the 5.3 kg sled (slope is on an angle, angle not given). It is to be pulled across the snow with a coefficient of friction equal to 0.12. What horizontal force is required to pill the sled at a constant speed?

71. ## physics

if an object has covered first 30 m distance in 5 sec and other 40 m distance in 20 min.find the average speed in cgs system.

72. ## Math

Evaluate the algebraic expression: 6x+2= 3x-4= 9x+6=

73. ## Physics

An electric lawn mower has a resistance of 160 ohms and draws 15A. What is the cost of operating the lawn mower for 30 minutes if electrical energy costs \$0.12/kWh?

74. ## Science

A rod of length L=1.80m is mounted to a wheel (solid cylinder) of radius R=8.00cm. A massless rope is wound on the wheel, and then connects to a block of mass m=0.250kg. The mass is released from rest and allowed to fall. 1. Find the tension in the rope.

75. ## statistics for health research

Descriptive statistics are widely used in qualitative research. When establishing if a population is normally distributed explain when the statistics of sample size, mean, mode, median, skewness and kurtosis will guide the researcher to make conclusions of

76. ## American National Government

If the President requests a Congressional authorization for the use of force, Congress

77. ## Physics

Car is pulling a 3198kg trailer producing a accerlation of 0.2m/s2. Frictional force on the wheels is 740n. What is the applied force on the trailer?

78. ## Algebra

solve the problem grafically, 4y=x+4, x=2/3y+8/3

79. ## physics

a man moves 2km/hour and rain has started now falling with 2km/hour at what angle should umbrellla be kept so that man can not go wet

80. ## Educational Testing & Measurements

What is the T-score if the Raw is 35?

82. ## economics

The US Commerce Department recently did not allow AT&T to buy T-Mobile because they would become the largest cell phone provider. This is in conflict with the world wide trend of:

83. ## economics

what are the cost and consequences of providing the subidies and welfare?

84. ## sci

how is it that kinetic and potential energy involve roller coasters and electricity.

85. ## Early Childhood Education

The __________ and __________ approaches use webbing. A. information; emergent creative B. emergent creative; conventional C. conventional; information D. learning; information

86. ## science:biology

what does the following carry. 1.artery 2.vein 3.pulmonary artery. 4.pulmonary vein 5.right auricle 6.right ventricle. 7.left auricle 8.left ventricle

COPPER

88. ## Calculus

∫1/(x2 − 2x + 8)3/2 dx

89. ## English

1. She likes various animals. --------- What is the opposite of various?

90. ## English

1. How about sending her flowers? 2. How about sending flowers to her? 3. How about sending flowers, which is hers? (Does #1 mean #2 or #3?)

LIFE

92. ## sun shine high shcool

what is heat of nuetralization