# Questions Asked onOctober 10, 2009

1. ## Physics

Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 m long. The first moves past her in 1.75 s and the second in 1.17 s. Find the constant acceleration of the train. I know how

2. ## physics

An inquisitive physics student and mountain climber climbs a 50.0 m cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of

3. ## physics

A motorist travels at a constant speed of 34.0 m/s through a school zone; exceeding the posted speed limit. A policeman, waits 7.0 s before giving chase at an acceleration of 3.9 m/s2. (a) Find the time required to catch the car, from the instant the car

4. ## chemistry

In which reaction does the smallest percentage change in volume occur? a) C3H8 (g) + 5O2(g) ---> 3CO2(g) + 4H2O(l) b) 4NH3(g) + 3O2(g) ----> 2N2(g) + 6H2O(l) c) CH4(g)+ 2O2(g) ----> CO2(g) + 2H2O(l) d) 2H2S(g) + SO2 (g) ----> 3S(s) + 2H2O(l) The correct

5. ## physival education

when where and why was the ancient olympic games started?

6. ## Physics

The minimum distance required to stop a car moving at 46.0 mi/h is 39.0 ft. What is the minimum stopping distance for the same car moving at 80.0 mi/h, assuming the same rate of acceleration? Can I do a proportion or is this totally different?

7. ## Physics

An object of mass M = 1,114 g is free to move along a horizontal, frictionless surface. This object is further connected to a second object with a mass of m = 811 g by means of a massless string that extends around a massless, frictionless pulley. Find the

8. ## Chemistry

During your experiment, you are drive water from the hydrate MxXy*zH2O. You subsequently determine that your hydrate has six molecules of waters associated with each formula unit. However, the bottle the hydrate came from indicated a formula with only four

9. ## physics

The figure below shows an object of mass M = 1,276 g. It is free to move along a horizontal, frictionless surface. This object is further connected to a second object with a mass of m = 1,362 g by means of a massless string that extends around a massless,

10. ## chemistry

In which reaction does the smallest percentage change in volume occur? a) C3H8 (g) + 5O2(g) ---> 3CO2(g) + 4H2O(l) b) 4NH3(g) + 3O2(g) ----> 2N2(g) + 6H2O(l) c) CH4(g)+ 2O2(g) ----> CO2(g) + 2H2O(l) d) 2H2S(g) + SO2 (g) ----> 3S(s) + 2H2O(l) The correct

11. ## science

I have two questions. I'm doing a crossword puzzle and this is the question. "sometimes scientist make a mistake or ___and need to do the experiment again." The answer is 5 letters and the second to last letter is an O. The second question is "After the

12. ## Physics

Leg traction is applied to a patient's leg. If the physician requested a 32N force to be applied to the leg, and the angle is 60 degrees, what mass m must be used for the object hanging from the massless cable?

13. ## physics

A 40.0 kg wagon is towed up a hill inclined at 17.9° with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 140 N. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. How fast is

14. ## Maths

which amount up to £1 cannot be paid exactly with fewer than 6 coins? is this a trick question and can all the amounts be paid?! I am really struggling with this one

15. ## physics

A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.2 m/s at ground level. Its engines then fire and it accelerates upward at 4.20 m/s2 until it reaches an altitude of 960 m. At that point its engines fail, and

16. ## math

2,750um to Mm CF=10^12 2,750um=2,750*10^-12 What does CF stand for. small to big you divide, so why don't I divide by 5 lots of 1000. Can you please give me some examples of conversions like this one. Thanks

17. ## physics

A meteor P is tracked by a radar observatory on the earth at O. When the meteor is directly overhead (theta = 90), the following observations are recorded: r = 80km, r'= -20km/s, and theta'= 0.4rad/s. (a) Determine the speed of the meteor and the angle,

18. ## Statistic

Twenty students assigned to an experimental group receive 30 in a control group has a mean of 38 on the test (with an estimated population standard deviation of 3); the control group has a mean of 35 (with an estimated population standard deviation of 5).

19. ## Physics

A motorist travels at a constant speed of 34.0 m/s through a school zone; exceeding the posted speed limit. A policeman, waits 7.0 s before giving chase at an acceleration of 3.9 m/s2. (a) Find the time required to catch the car, from the instant the car

20. ## Programming & Algorithm

(1) How to design algorithms to implement the stack operations. (2) Write a program to multiply any two matrices. (Using Basic) and finally, (3) Consider the algebraic expression E=(2x+y)(5a-b)^3. Draw the tree T which correspond to the expression E and

21. ## Physics

A ball is thrown directly downward, with an initial speed of 7.40 m/s, from a height of 31.0 m. After what time interval does the ball strike the ground? I thought it would be 31 m / 7.40 = 4.18 seconds, but it's the wrong answer.

22. ## math

Car jacks are constructed like a rhombus. When used to raise a car, the rhombus is seen. If the sides of the rhombus are 13 inches, what is the maximum lenght of the shaft

23. ## ap calc

A pool, that is 12 feet wide and 18 feet long, is to have a sidewalk of uniform length constructed around its perimeter. a. write the equation for the area A, of the pool with the sidewalk b. determine the domain of the area of the pool with the sidewalk

24. ## physics

An object of mass M = 924 g is pushed at a constant speed up a frictionless inclined surface which forms an angle è = 50 degrees with the horizontal as shown in the figure below. What is the magnitude of the force that is exerted by the inclined surface

25. ## curriculum content

Which is the oldest art? A. Drama/theater B. Photography C. Dance D. Music

26. ## Crt205

10) Sentence 5 supports the author’s argument primarily by

27. ## Chemistry

Is this equation correct? KI + HCl +KMnO4 --> KCl +MnCl +H2O + I2 If so what would be the color of the solution? PS. I am aware the equation is not balanced. =]

28. ## Algebra

I had to solve 2x^2-x-1 using the quad. formula. I got it down to (1 +/- the square root of neg. 8) divided by four. I broke the sq. of neg. 8 into the sq. root of 4 and the sq. root of -2. But my question is could it also be the sq. root of -4 and the sq.

29. ## AP Lit - Cantos I by Ezra Pound

Why did Ezra pound choose Canto 1 to be the first poem of his Cantos? And also, why did he end his poem with "so that?" I don't really know the first one. It could be because it sets up the whole story line for the second two possibly. The second one, I

30. ## chemistry

elements x and y are from group 7 in the periodic table. x is a liquid at rtp, while y is a solid at rtp. which statements are correct? 1) atoms of y have more protons than atoms of x 2) molecules of y have more atoms than molecules of x 3) y displaces x

31. ## Psy 210

The following table describes five situations in which a person reacts to stress in an unhealthy manner. For each: a. identify the stressor(s). b. briefly explain why the person's reaction is an unhealthy choice. c. briefly describe one healthy alternative

32. ## physics

A ball starts from rest and accelerates at 0.520 m/s2 while moving down an inclined plane 9.65 m long. When it reaches the bottom, the ball rolls up another plane, where, after moving 14.40 m, it comes to rest. (a) What is the speed of the ball at the

33. ## Algebra

Graphing the system of inequalities. y>= -5 x>= 6

34. ## marketing

Keeping in view the 4Ps of Marketing, describe a recent purchase you have made and suggest why that particular product was available at the store in which you made your purchase.

35. ## finance

If jim wants to accumulatw \$13,217.74 in 2 years. currently has \$10,477.03 to invest. what interest rate must he earn on the investment if he deposits \$10,477.03 today to have \$13,217.74 exactly 2 years from today?

36. ## physics

An object of mass M = 924 g is pushed at a constant speed up a frictionless inclined surface which forms an angle è = 50 degrees with the horizontal as shown in the figure below. What is the magnitude of the force that is exerted by the inclined surface

37. ## science Opinions

i need some of your opinions on this question: how will gasoline being replaced with biofuel from garbages affect you peronally? please write your opinions please

38. ## health

Compose a list in which you identify the major components of health communication. Who is involved in each component? How does each component promote health communication? If not utilized, how would it reduce health communication? Provide examples.

39. ## Algebra

Solve x^2-10x+22=0 by using the quadratic formula. After I substituted in the values for A, B, and C, and broke it down I got 10 plus or minus 2 times the square root of three/2. How do you break this down further? I know ten can be divided by 2 to get

40. ## English

Edit and review please. Write an essay in which you analyze the changes in the literary selections you have read thus far, beginning with the Anglo-Saxon period and going through the seventeenth century. What differences do you notice in the topics, themes

41. ## sra jmcguin

Hi - we do not have to turn in until Monday - so I rewrote some to have it make more sense - do you see any mistakes - thanks so much sam Mis vacaciones preferidas En ese momento el avión salio. No tenia miedo. Este era mi primer viaje a otro país.

42. ## CRT 205

4a. John has become a rather good actor. 4b. John has became a rather good actor.( I chose 4a) 5a. Some athletes have taken drug test to prove they are not on steroids. 5b. Some athletes have took drug tests to prove they are not on steroids ( I chose 5a)

43. ## math

for coordinates if they write x=4: what does it mean

44. ## Algebra

I have to rationalize the denominator of 2+3i/1+2i. I multiplyed this expression by 1-2i/1-2i, resulting in 2+4i+3i+-6i^2/1+-2i+2i+-4i^2. It then became 2+2i+3i+6/1-1+2i+3. Is this right? Thanks!

45. ## Chemistry

1. name one structural and one chemical difference between acetylene and ethylene. give rasons. 2. why is the benzene much less reactive than 1, 3,5-cyclohexatriene? 3. What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are

46. ## Algebra

Identify the independent and dependent quantity in each situation: The air temperature outside increases with the time of day

47. ## chemistry

how to caculate moles with only molarmass

1/2x-9=11

49. ## Statistic

Four researcher participants take a test of manual dexerity(high scores mean better dexerity) and an anxiety test(high scores mean more anxiety). The scores are as followed. PersonDexerityAnxiety 1 1 10 2 1 8 3 2 4 4 4 -2

50. ## history

how are political decisions made in the United States?

51. ## science

look..i'm not really good in english..but i really2 need help here..why jellyfish must be in buoyancy of water group???

52. ## Physics

An object of mass M = 649 g is pushed at a constant speed up a frictionless inclined surface which forms an angle θ = 50o with the horizontal. What is the magnitude of the force that is exerted by the inclined surface on the object?

53. ## math

a man has 6 houses in each house he keeps 6 cats each cat has 6 whiskers on each whisker sit 6 fleas how many are there in all

54. ## critical thinking

3 false or questionable assumptions that individuals often make (about anything) What makes these assumptions false or questionable? Which false or questionable conclusions might one very easily draw from each of these assumptions? What makes these

55. ## math

If a stone is dropped from rest and falls under gravity with an acceleration of 10m/s2, how long will it take before the stone is travelling at 25m/s? Can you show me how to work this out with math rules. I do not get it. Thanks

56. ## math

If a vehicle travles with a constant acceleration of 3km/hr for 5 hours, what was its initial velocity if the final velocity was 100km/hr? Can you please show me how to work this out in math terms.Can you explain it to me. thank you so much.

57. ## Lit

Where can I find a list of literary themes?

58. ## psychology

how does ms disrupts normal brain function?

59. ## Spanish sra JMcGuin

thank you for always helping!

60. ## Statistics

Can "effect size" be determined without also knowing the population standard deviation?

61. ## college

What is the American dream?

62. ## math

What is the difference between the constant of proportionality and the mean? Constant and Mean? Thanks

63. ## algerbra 1

(3+c)+2=7*(3-2)

64. ## math

Can you please give me a few different math examples of what you meant when you said - You do not add powers with different exponents, but not powers of different bases. Thank you so much.

65. ## science

Which mineral identification test would be easy for a person to preform at home?which would be difficult?

66. ## ap world civilization

i need help finding a thesis for chapter 5

67. ## science

what is radio metric dating of the earth and how does it wor?

68. ## math

Soybean milk in 18% protein; cornmeal is 19% cornmeal. How many pounds of each should be mixed together in order to get 360-lbs. mixture that is 15% protein?

69. ## math

what would you consider to be the most appropriate form for displaying the data. For each set, develop and appropriately label a graph. Then write a short paragraph justifying your selection. Stress Units of Various Life Experiences Experience Stress Units

70. ## science

is a news article the same as a news story is this a news article or a news story? Is Garbage The Solution To Tackling Climate Change? ScienceDaily (Oct. 3, 2009) — Converting the rubbish that fills the world’s landfills into biofuel may be the answer

what is the 10 and 5 \12 as equilvalent improper fraction

72. ## English MLA Format

I writing an essay on Stevenson's Dr. Jekyll and Mr. Hyde. When I use a quote, to put the page number at the end can I just do (37)or do I have to put (Stevenson 37). I have found it both ways on the internet and I don't have my MLA book at home. Thanks

73. ## math

If a car has an initial velocity of 103m/s and accelerates at 1m/s for 3 seconds, what will its final velocity be? Can you please show me how to work this question out with math answers and explain it to me. Thank you.

74. ## east central

Four research participants taken a test of manuel dexrerity and an anxiety test

75. ## algbera

Can you tell if the problem i made up is a good two step equation problem. Steven wants to pay of a car loan the total amount is \$500 dollars.He has five months to pay it of.How much does he have to pay per money to pay of the loan .Write a equation and

76. ## math

on tv show contestant is asked to select a door and is rewarded wigh \$40,000 or \$3, or \$50 what is expected value of the selecion

77. ## science

what is not a major function of the plasma proteins in blood

78. ## Environmental science

Management and sustainability plan for deforestation.........I have the causes but when it comes to corrected the problem, I have several ideas, such as the UN funding program to pay countries such as Indoesnia to stop deforestation but this solution has

79. ## tourism

What's the difference between a marketing consortia and a hotel refferal system?

80. ## Finance.

Anthony is asking you to invest in a venture that will double your money in 3 years. Compute the annual rate of return they are promising you?

81. ## Texas History

Why did Spanish missionaries continue their work in East Texas and on the Plains when many people there resented them?

82. ## Criminology

How do the psychological and sociological explanations of crime explain the actions of a serial rapist? I have searched for information regarding these theories of criminal behavior, but I am comming up short. Please help