# Questions Asked onJune 21, 2011

1. ## PHYSICS

A 900 kg car pushes a 1900 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4800 N. (a) What is the magnitude of the force of the car on the truck? (b) What is

John & Jane are married. The probability that John watches a certain television show is .4. The probability that Jane watches the show is .5. The probability that John watches the show, given that Jane does, is .7. 1) find probability that both John & Jane

3. ## geometry

Given: BD is a diameter m 1 = 100°m BC = 30° m 2 = ?degrees Given: BD is a diameter m 1 = 100°m BC = 30° m 3 = ? degrees Given: BD is a diameter m 1 = 100°m BC = 30° m 4 =? degrees Given: BD is a diameterm 1 = 100°m BC = 30° m AD = ?degrees Given:

4. ## PHYSICS

The three ropes in the figure are tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown, with T3 = 90 N and θ = 35°. What are T1 and T2, the magnitudes of the tension forces in the

5. ## chemistry

25cm3 of a solution of 0.1mol dm-3 NaoH reacts with 50cm3 of a solution of hydrochloric acid.What is the molarity of the acid

6. ## physics

As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 its mass is 0.145. A) What is the baseballs acceleration in m/s^2 and in g's? B) What is the size of force acting on it?

7. ## Physics

"The energy that is transferred as heat to or from the object with the larger heat capacity must be greater than the energy that is transferred as heat to or from the object with the smaller heat capacity." Can someone explain why this concept is true or

8. ## chemistry

molecular and net ionic equations for FeCl3 + Na2S

9. ## geometry

If m angle 1 = 90°, what is m ADB?

Below is the last stanza of a poem, "Dover Beach," written in 1876 by Matthew Arnold. Ah, love, let us be true To one another! for the world, which seems To lie before us like a land of dreams, So various, so beautiful, so new, Hath really neither joy, nor

11. ## chemistry

Calculate the number of moles of FeSO4 in 25cm3 of a 0.2mol dm3 solution

12. ## chemistry

Calculate the relative molecular mass of a gas if a 500cm3 sample at 20¢ªC and 1 atomic mass of 0.66g

13. ## physics

a driver releases an air bubble of volume 2.0 cm^3 from a depth of 15 m below the surface of a lake where the temperature is 70C.

14. ## physics

How much force does an 60 kg astronaut exert on his chair while accelerating straight up at 8m/s squared?

15. ## chemistry

consider a neutral atom with 30 protons and 34 neutrons. What is the mass number for the atom?

16. ## Physics

A flower pot is dropped out of the twentieth story window. How far does the pot drop in 3 seconds? How fast will it be moving after 7 seconds?

17. ## stressed syllables

umbrella, homework,slowly, follow... what word of stressed syllable is different?

18. ## physics

A boy drops a stone-A, down from a cliff 480 meters high, next he throws a stone-B, 1 second later - at what initial velocity was the stone-B be thrown so as to meet the stone-A on ground at the same time? g=10 m/s2.

19. ## geometry

what is the similarity ratio for two circles with areas 2pi m2 and 200pi m2

20. ## Integrated Physics and Chemistry

How many calories are absorbed by a copper spoon with a mass of 200 grams as it changes from 28°C to 33°C? A) 0.00027 B) 3 C) 90 D) 13,000 And this one. How do i solve this one?

21. ## chemistry

what is the following reaction? HNO3(aq) + KOH(aq) ---> KNO3(aq) + H2O(l)

22. ## Math

Express the number 25 as a sum of two nonnegative numbers whose product is as large as possible.

23. ## physics

How much force does an 60 kg astronaut exert on his chair while accelerating straight up at 8m/s squared?

24. ## physics

A body travels along a circular path of radius 70 m.After travelling half a revolution in 20 s find the ; 1.average velocity 2.average speed

25. ## science

A diesel engine's piston compresses 16 cm3 of fuel-air mixture into 1 cm3. The pressure changes from 1 atmosphere to 48 atmospheres. If the initial temperature of the gas was 305 K, what was the final temperature? Note: As long as the units for pressure

26. ## CHEMISTRY

ASSIGN FORMAL CHARGES TO FOLLOWING STRUCTRE, H-N-C-H3

27. ## math

Given the quadratic function f(x) = x2 – 12x + 36, find a value of x such that f(x) = 25.

29. ## Physics

A 36 kg box hangs from a rope. What is the tension in the rope if the following are true? (a) The box moves up a steady 5.0 m/s? (b) The box has vy = 5.0 m/s and is slowing down up at 5.0 m/s2?

30. ## math

Determine the equation of joint variation. Then solve for the missing value. x varies directly with y and z. x = 400 when y = 8 and z = 10. Find x when y = 10 and z = 12.

31. ## Physics

A hang glider and its pilot have a total mass equal to 120 kg. While executing a 360 degree turn, the glider moves in a circle with an 8-m radius. The gliders mass is 10 m/s. a) what is the net force on the hang glider? b) What is the acceleration?

32. ## math

Multiply. show complete work 2x + 4 by -5x2 – 3x – 2

33. ## Physics

1. Tyler pulls a box full of baby ferrets across the floor by means of a rope that is tied to the box. The rope makes an angle of 41 degrees with the horizontal and tyler pulls on the rope with a force of 60N. a)What is the horizontal component of the

34. ## electric power tools

what is the purpose of a diode in a cordless drill or power screwdriver?

35. ## Phyics

If a 68kg object is being pulled across the hard floor with a horizontal force of 400N... a. What would the acceleration of the object be if it was on a frictionless floor? b. if there were friction, what would the force of friction be if it was pulled at

36. ## GEOMETRY !!!

1)(5, -3) is reflected over the y-axis. What are the coordinates of the image? A) (5, 3) B) (-5, 3) C) (-3, 5) D) (-5, -3) 2)If a translation is defined by (x, y) (x + 2, y - 3), what is the image of the preimage point (-3, 5)? A) (-5, 8) B) (-5, 2) C)

Which of the following is a challenge to building goodwill? (Points: 5) Stating that the customer's criticism of the company is justified Stating that the company has made an error Answering no to the customer Making it easy for the customer to respond Is

38. ## English - Debate writting

PLS I NEED POINTS TO WRITE THIS DEBATE. Write against the motion ' The use of mobile phones by second cycle institution boarding students is essential '.

39. ## Chemistry

A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon?

40. ## chemistry

If 1.5 mol of each of the following compounds is completely combusted in oxygen, which one will produce the largest number of moles of H2O and why?

41. ## rfvv

The dentist's is very busy, so we have to book the visit beforehand. You have to have your decayed tooth pulled out, but we have to wait for about one month? Can you wait? If you feel painful from time to time, let's go to the dentist's and if a doctor can

42. ## AP English Lang. & Comp.

My Assignment: Read the book, 'Animal Farm' by George Orwell. After reading the book, create a composition that examines the similarities and differences between the Russian Revolution and the events in this novel. Research any other 'rebellions' that have

43. ## Physical Science 2

Given that iron has a density of 7.87 g/cm3, calculate the volumeof 100 g of iron and 50 g of iron

44. ## Nursing School

how many grams of lithium hydroxide are needed to remove 4500 grams carbon dioxide by a submarine atmospheric regulator and acts according to the following formula? 2LiOh+CO2>Li2CO3+H2O

45. ## statistics

Suppose you want to test the claim that mu is not equal to 3.5. Given a sample size of n = 31 and a level of significance of alpha = 0.10 when should you reject Ho? A) Reject Ho if the standardized test statistic is greater than 2.575 or less than -2.575.

46. ## Physics

You throw a ball horizontally off of a building with a horizontal velocity of 5 m/s. What's the ball horizontal velocity 8 seconds later? How high should the building be if you want the ball to fall for a total of 12 seconds?

47. ## physics

1. There are three forces acting on an object, a 30N force pulling right, a 50N force pushing right, and 30N frictional force pushing left. a. What is the force of gravity on this 15kg object? b. If the object is on the ground what is the normal force

48. ## chemistry

Which of the following would be the best technique to use in order to separate a soluble solid from a liquid?

49. ## Physics

Suppose a cylindrical platform with moment of inertia 0.005kg m2 is freely rotating at angular speed 10 rad/s. A disc initially, rotationally at rest with mass 0.6kg and radius 0.1 m is dropped onto the platform so that their centers coincide. The kinetic

50. ## Physics

What is the mass of a football player who 1250 N?

51. ## Life orentation

A clear explanation of how smoking is a human factor that may cause ill health, accidents, crises or disaster?

52. ## physics

1. An object traveling at a constant speed of 22m/s begins to experience a force of 15N in the opposite direction of its motion. (Hint given: Start by finding objects acceleration) a. How long will it take for the 8kg object to come to a complete stop once

53. ## Math

1.Approximate sqrt3 by applying Newton's Method to the equation (x^2-3) = 0 2.The equation (x^3-x-2) = 0 has one real solution for 1

54. ## English

I corrected the two sentences as you told me. Can you please check them? Thank you. 1) Coleridge's view of nature, unlike Wordsworth's, is infused with abstract and supernatural meanings. 2) Differing from Wordsworth, Coleridge's view of nature is infused

55. ## science

a piece of wood that measures 3.0 cm by 4.0 cm by 5.0 cm has a mass of 90.og. what is the density of the wood? would the piece of wood float in water? remember the density of water is 1.00g/ml

56. ## math

Filling a tank. Two pipes are connected to the same tank. Working together they can fill the tank in 4 hrs. The larger pipe working alone can fill the tank 6 hrs less than the smaller one, HOw long would the smaller one take, working alone, to fill the

57. ## geometry

Find the total surface area of a square pyramid with a base length of 18 and height of 12

58. ## English

Thank you really much. Here are some more sentences I'd like you to check. 1)Victorian refers to a set of moral values which were established during the reign of Queen Victoria. They were based on personal duty, hard work, respectability and charity. )

59. ## Chemistry

3. A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon? 4. A 1.00 g Sample of C7H603 (s), us completely

60. ## nursing

Intravenous infusions of sodium bicarbonate are often given to acidotic patients to correct acidosis and relieve the strain of rapid breathing. Explain why bicarbonate is helpful in this situation. What would happen if too much bicarbonate were given?

61. ## Physics

2. Tyler pulls a box full of baby ferrets across the floor by means of a rope that is tied to the box. The rope makes an angle of 41 degrees with the horizontal and tyler pulls on the rope with a force of 60N. a)What is the horizontal component of the

62. ## Helen

How do you know which elements are solids, liquids, and gases at STP?

63. ## moore boring chemistry! :(

Why do groups I, II, & III easily form halide compounds? & can you explain what a halide compound is?

64. ## Physics

Block B weighs 716 N. The coefficient of static friction between block and table is 0.31. Assume that the cord between B and the knot is horizontal. Find the maximum weight of block A for which the system will be stationary. The figure has block B on a

65. ## Physics

James and Steve have a contest to see who can kick a football further. James kicks the football at an angle up of 57 degrees, and a speed of 75m/s. Steve kicks the ball with a speed of 100m/s, at an angle up of 48 degrees? Who wins the contest? Please show

66. ## Algebra

Write an equivalent expression without using grouping symbols -(3x+5)

67. ## chemistry

The body consist of elements, 65% oxygen is in the blood and 18% carbon. Anything in the body tends to be a compound. Is blood always 65 % oxygen and 18% carbon?

68. ## AP World History

3.Explain the major tenets of Hinduism and its evolution from the Aryans to the Gupta. Please help with this question I have no idea how to answer its the last one could you give me some websites please. -Thank You

69. ## math

A car travels at an average speed of 36 kilometers per hour. Write and solve an equation to predict how many hours if will take travel 432kph. It if continues of this speed.

70. ## math

Joe has a collection of nickels and dimes that is worth \$6.20. If the number of dimes was doubled and the number of nickels was decreased by 37, the value of the coins would be \$8.85. How many nickels and dimes does he have?

71. ## chemistry

complete and balance the following molecular equations and then write net ionic equations for each reaction. BaCl2(aq) + K2SO4(aq) KNO3(aq) + HCl(aq)

72. ## mathematics

Given that A+B =120¢ª and CosA + Cos B = 1/¡î2 show that cos(A+B)/2 =1/¡î2

73. ## boooring chemistry!!:(

Why do the halogens easily form ionic and covalent bonds? Can someone explain this to me?! :(

74. ## math

Rewrite with positive exponents. Assume that even roots are of nonnegative quantities and that all denominators are nonzero. (2x/y2)^-4

75. ## English

Could you please check these last two sentences, please? Thank you for your help. 1. Britain entered the First World War in 1914 by declaring war on Germany after the German invasion of Belgium. Peace was made at Versailles in 1919. Many British war poets

76. ## geometry

A rectangular garden 10m * 18m . Find the area of a sidewalk that is 2m from the side of a garden ?

77. ## Algebra

Perform the indicated operation if possible simplify 3/4 / (-2/3)

78. ## Physics

If a 70g swimmer pushes off a pool wall with a force of250n, what is her acceleration?

79. ## physics

1. a force of 30n with a direction of 35 degrees northwest acts on point p. Find: a) the northward component on the force b) the westward component of the force Please show work. Thanks!

80. ## Physics

A sample of serum has a mass of 54 gm and a volume of 225cm. What's the density in g/cm? I think the answer is .24g/c please correct me of I'm wrong but my ? is what would be the mass of 150 fluid ounces of this serum? What would be the volume of 1 pound

81. ## Physics

What is the difference between velocity and acceleration?

82. ## algebra

what is 6y square -5y -2??

83. ## algebra

As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have 38

84. ## math

the equation of a line perpendicular to the line y = x - 3 and containing the point (8, -2).

85. ## Physics

If a car travel at an average speed of 80 km per hr for 20 min, and then slowed down to an average speed of 50 km per hr over the next 15 min. How far would it travel in total?

86. ## operating system

Given that main memory is composed of three page frames for public use and that a seven page program (with pages a, b, c, d, e, f, g) requests pages in the following order:

87. ## Algebra

Identify the terms in each expression -4-3x+2xy

88. ## Lab

When doing a virtual lab everything is exact, but why would they still ask for absolute and relative errors?

89. ## geography

what is a map?!

90. ## science

cslculate the molarity of a solution of 10.0g MgCl2 in a 300.0ml of solution

91. ## Chemistry

Find the [OH-] of .196 M NaOH and .262 M NH4Cl

92. ## statistics

You are the manager at a company and are asked to present a report on the year-to-date performance of your division. What type of statistical information would you include in your report? In paticular, which descriptive statistics (mean,median, standard

A letter can: (Points: 5) influence what a person thinks about an organization. strengthen positive tone with the use of "we." help you build on an exaggerated attitude. help your customer overcome your bragging attitude. is A correct any other opinions

What is deductive order strategy?

95. ## BIS155

If data is in text file form, what step will you take to assume the data is usable and ready for analysis?

96. ## Physical science

A projectile spends 20 seconds in the air. It reaches a peak height of 8 meters. How long does it take to reach it's peak height? The projectile has a range of 80 meters. What is it's horizontal velocity?

97. ## CALCULUS

difinite integral f(x)=1/y^2dy from x=1 to x=4

98. ## Spanish

Nobody wants to go with me. A) no va alquien conmigo. B) no quiere ir conmigo C) quiere ir nadie conmigo D) no quiere ir nadie conmigo. i got c. is that correct?

99. ## mathematics

Given that Sin(A+B)=2Cos(A-B) and tan A = 1/3 , Find the exact value of tan B.

100. ## algebra

How do I solve this problem? 1/b (2b-10) = 17

101. ## Physical science

A projectile spends a total of 20 seconds in the air. It reaches a peak height of 8 meters. How long does it take to reach it's peak height

102. ## statistics

I am having trouble knowing if I add or multiply with this problem: Male Female Age 19 and under 4746 4517 Age 20 1625 1553 Age 21 1679 1627 Choose one driver at random. Find the probability that the driver is Male and 19 or under. Now, do I find the

103. ## chemistry

calculate the solubility of na cl

104. ## Math

The notation [x ] stands for the greatest integer that is less than or equal to x. Calculate [-1,2]

105. ## Chem

6.6×10−3 M Ba(OH)2 and 1.00×10−2 M BaCl2 what is [OH-] of solution?

106. ## Chem

Find [OH-] of 0.325 M (NH4)2SO4 and 0.490 M NH3

107. ## psychology 201

The text summarizes positive psychology as being aware that humans are both creatures and creators of their personal and social worlds. What does this statement mean to you? Do you agree that humans are creatures as well as creators of their personal and

108. ## math

Sum of 2 numbers is 1 and their product is 1/8. Find their difference.

109. ## math

Express in terms of i. ã-225 + ã-49

110. ## MATHEMATICS

a) Given that A+B =120¢ª and cos A + cos B = 1/¡î2 show that cos(A+B)/2 =1/¡î2

111. ## anthropology

mechanism of natural selection( heritability, variation, differential reproductive success) how it works with behavioral examples

112. ## geometry

How many boxes that is 5" * 4" * 3" could be placed inside a big box of 40" * 32" * 24" ??

113. ## Criminology

some states created internet registeries to publicize name of people convicted of making or selling methamphetamine. (T?F)

114. ## physics

how friction help in opposing a football

115. ## algebra

1. Imagine you are in the market for a new home and are interested in a new housing community under construction in a different city. a. The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to

116. ## Math

write as a single fraction in its lowest terms: (x-2)/3 + (x+1)/4

117. ## math

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. -15r + 12s = 24 30r – 24s = 48

118. ## Physics

1. a force of 30n with a direction of 35 degrees northwest acts on point p. Find: a) the northward component on the force b) the westward component of the force

119. ## Physics

James and Steve have a contest to see who can kick a football further. James kicks the football at an angle up of 57 degrees, and a speed of 75m/s. Steve kicks the ball with a speed of 100m/s, at an angle up of 48 degrees? Who wins the contest?

120. ## English

Can you just check if everything is correct? Thank you. 1) Focus on the two recurrent themes in Joyce’s Dubliners and explain what all the characters have in common. They focus on two recurrent themes: paralysis and epiphany. 2) Paralysis can be

121. ## MATHEMATICS

Given that Sin(A+B)=2Cos(A-B) and tan A = 1/3 , Find the exact value of tan B.

122. ## mathematics

Given that A+B =120¢ª and cos A + cos B = 1/¡î2 show that cos(A+B)/2 =1/¡î2

123. ## math

Subtract.show complete work (2x8 – x3 + 4x2 + 5) – (8x7 + 8x3 – 4x)

124. ## algebra

how do I solve this equation? 1/b (2b-10)=17

125. ## Physics

example that show the # part of distance and the # part of displacement can be the same for the same motion

126. ## Physics

example that show the # part of distance and the # part of displacement can be different for the same motion

127. ## CALCULUS

difinite integral f(x)=8-4 cube root-3(x) from x=0 to x=8

128. ## English

I forgot to include this sentence. Can you please check the tense choice since I switched from the past to the present? Thank you. 1) In the poem Daffodils the flowers are presented not as statically as in a painting, but alive with motion. 2.They lay

129. ## English

Could you please help me check these sentences? Thank you very much in advance. 1) The First World War, or the Great War as it used to be called, is rightly thought of as bringing cataclysmic changes in life, thought and social forms not only in Britain

130. ## college algebra

I don't understand the steps for doing synthetic division in college algebra

131. ## math

9^x - 4 X 3^x = 45. Find x In words: 9 raised to the power x minus 4 multiplied by 3 raised to the power x is equal to 45. Find x.

132. ## History-Civil War

Battle of Chattanooga, last fought by Grant and Sherman together. Why was its outcome significant ?

133. ## Social Studies

Why might the Unions advantages have not guaranteed easy victory over the Confederate?

asked by Melissa Tavares Elgamel Wong
134. ## college chemistry

Why is iodine important to biological tissues such as the thyroid gland? Give a prediction for why iodine is added to the table salt supply. ** I have no idea! :(

Is: "Learn how to analyze business audiences, improve your style, and edit thoroughly." An example os parallel structure?

136. ## English

I left out the following sentences. They are part of the same paragraph. Thank you. 6.She is not going to give up (?) her second-holiday home because the rent is very cheap and the place does her husband good because it keeps him three hundred miles away

137. ## Africa

What ir irrigation agriculture?

138. ## English

I chose the five sentences I was most doubtful about. I really hope you can check them. 1) The First World War, or the Great War as it used to be called, is rightly thought of as bringing cataclysmic changes in life, thought and social forms not only in

139. ## Life orientation

5 ways in which human impacts on community