# Questions Asked onFebruary 14, 2009

1. ## statistics

Fast Auto Service provides oil and lube service for cars. It is known that the mean time taken for oil and lube service at this garage is 15 minutes per car and the standard deviation is 2.4 minutes. The management wants to promote the business by

2. ## physics

please show me in steps how to solve this thanks alot! A bobsled zips down an ice track, starting from rest at the top of a hill with a vertical height of 150m. Disregarding friction, what is the velocity of the bobsled at the bottom of the hill? (g=9.81

3. ## chemistry

0.10 M methylamine (CH3NH2) kb= 4.38e-4 calc the percent ionization so i did the ICE table to find that x=6.26e-3 and then i divided by .1 and then multiplied by 100. but i got the wrong answer whats did i do wrong?

4. ## Chemistry

Calculate the percent ionization of benzoic acid at the following concentrations: 0.00014 M i got 68% but it says its wrong

5. ## Chemistry

What is [H3O+] in a solution obtained by dissolving 215 mL HCl(g), measured at 23 degrees C and 757 mmHg, in 4.30 L of aqueous solution?

6. ## Science

A block of iron is transported to the moon.Which of the following is true? Both the mass and weight remain unchanged Both the mass and weight decrease The mass remain the same,but weight decreases The mass decreases, but the weight remains the same

7. ## Chemistry

For the reaction of hydrazine (N2H4) in water, Kb is 3.0 10-6. H2NNH2(aq) + H2O(l) H2NNH3+(aq) + OH -(aq) Calculate the concentrations of all species and the pH of a 2.2 M solution of hydrazine in water. okay so i don't know how to do this problem because

8. ## Economics*Micro

A market has the following demand and supply equations: Qd = -50P + 1000 Qs = 150P - 400 Which of the following statements is true? a. If the price were \$9, a surplus of 300 units would exist and price would tend to fall. b. If the price were \$3, a

9. ## Chem

What is the original molarity of a solution of ammonia whose pH is 11.11 okay i tried to convert to pOH- so i got 2.89 and then to [OH]=1.288e-3 and then solve using Kb=1.8e-5 whats going wrong???

10. ## Algebra 1

Ms. Buxx invested a total of \$2000 in two saving accounts. The first account pays 3% intrest per year. The second accout pays 5% intrest per year. If the intrest form both accounts totals \$84 dollars per year how much is invested in each account?

11. ## Economics *Micro

If the price of a good is low, a. firms would increase profit by increasing output. b. the supply curve for the good will shift to the left. c. the quantity supplied of the good could be zero. d. firms can and should raise the price of the product.

12. ## Chemistry

How many millimeters of this solution should be diluted with water to produce 650 mL of a solution with pH= 11.50? 6.8% ammonia (d= 0.97g/ml)

13. ## English Opinion

I need a good attention grabber for the introduction of my paper was as a social disease? I was wondering if you think that this quote fits with the topic or have another one in mind that I could use. War is a malignant disease, an idiocy, a prison, and

14. ## Chemistry-Science

Answer the following for a primitive cubic unit cell. Answers should be numerical, set r = 8.0 -edge in terms of r, the lattice pt radius:___ -face diagonal in terms of r, the lattice pt radius:___ -body diagonal in terms of r, the lattice pt radius:___

What is the current world population of clownfish?

16. ## Chemistry

What is the three dimensional structure of methane? Why?

17. ## Micro Economics

When we are forced to make choices we are facing the concept of 1. exploitation 2. efficiency 3. scarcity 4. the margin

18. ## Science

Two cars have the same mass, but one is moving three times faster than the other. How much more work will be needed to stop the faster car?

19. ## Biology

Why is the diameter of the afferent arteriole to the glomerulus larger than the efferent ateriole? Explain one example of a homeostatic mechanism in the body. Explain why the control of carbon-dioxide in the blood is a negative feed back mechanism.

20. ## Micro Economics

In monopolistic competition ______. 1.to maximize profits MR = MC, yet P > MC 2.people would be better off if output were reduced 3.output could be increased without an increase in total cost 4.A and B are true Because monopolistically competitive firms

21. ## Social Studies Opinion

What do you think about this aricle? Can I get some of your ideas? Indoctrinated in belief The statistics in "Darwin's sin" (Feb. 8), which indicate only half of Americans believe in evolution, are sad. Evolution is proven based on fact, scientific study

22. ## Algebra

The units digit of a two digit number is 1 more than twice the tens digit. If the digits are reversed, the new number is 36 more than the original number. Find the number. Please help!!

I have a 'movie' book report and I need some peopie to play parts for Huckleberry Finn. Could you give me a website to find some alive, famous people? (do not need to be actors)

24. ## osmotic pressure chemistry.

I have a question about osmotic pressure. I took a test in chemistry and this was a multiple choice question. It said given the molar mass of each solution, which one had the high osmotic pressure. So a high osmotic pressure, means a high molar mass or a

25. ## socio

pls help me on here. 1.) what is the total population of asia in 1980 and 2009. 2.) What is the total population of phillipines in 1980 and 2009. thanks. can't find it in web.

26. ## World culture and the arts

Explain in 200 to 300 words how artistic expression reflects the basic tenets of the Islamic faith in the following examples: 1. Architecture, a. Mosque, b. Minarets, 2. Persian Poetry, a. Relationship of lost lovers, b. Celebration of spring, 3. Music and

27. ## Chemistry

In a lab that I am doing I am having difficulty in determining this: What are two indications that suggest a reaction has taken place when HCI was added to Mg? In this lab I am taking 0.1 Mg and adding it to the flask, then recording the temperature of the

28. ## Economics *Micro

Goods Computer Wine x Y Qc Qw Country mil mil gal US 60 240 France 33 1/3 200 Assuming that without trade, -the US Produces 30 million computers, and - France produces 80 million gallons of wine. Also assuming that -both countries will completely

29. ## physicsss

A cable attached to a block of mass 11 kg pulls the block along a horizontal floor at a constant velocity. If the tension in the cable is 5.3 N, what is the coefficient of kinetic friction between the block and the floor?

Calculate the terminal velocity for a baseball. A baseball's diameter is approximately d = 0.073 m, and its mass is m = 0.146 kg. Express your answer in meters per second and miles per hour. (Assume a drag coefficient of 1 and air density of 1.3 kg/m3.) __

31. ## chemistry

how do you make 0.2M KI from 2M KI, what is the procedure?

32. ## physics

please help me by showing steps thanks Assuming atmospheric pressure to be 1.01 * 10^5 Pa and the density of sea water to be 1025 kg/m^3, what is the absolute pressure at a depth of 15.0m below the surface of the ocean? thanks again:)

33. ## Child Care

Carlos is playing in the sandbox. Thomas approches the sandbox, observes Carlos for a moment, then knocks over the bucket Carlos has just filled with sand. Carlos pushes Thomas away saying, Get out of here. Thomas begins to cry. How would an authoritian

34. ## ecology

what abiotic factor allows warblers to coexist peacefully in the spruce trees

35. ## Chemistry

Are these compounds organic, if not what are they? Kmno4 CH3OH C6H6 PdC12 CH3CO2H

36. ## Chemistry

Why is benzene much less reactive than 1, 3, 5-cyclohexatriene?

37. ## SCI 241

Describe, in 200 to 300 words, the path food follows through the digestive system and how digestion occurs in each of the following parts of the digestive system. Be sure to include descriptions of other organs or components of the digestive system,

38. ## science

why is photosynthesis critically important?

39. ## science-physics

1) A man places a ladder against a wall. He then climbs up the ladder. Briefly describe the forces acting on the man, on the ladder & on the wall? - On the man: gravitational force & frictional force? - On the ladder: gravitational force & frictional

40. ## osmotic pressure chemistry.

For a given mass of solute per liter of solution, the larger to formula mass, the lower the osmotic pressure. Osmotic pressure depends on molar concentration. A large molar mass would tend to produce a lower concentration in terms of moles of particles per

41. ## PHYSICS!

A projectile is fired with an initial speed of 32.5 m/s at an angle of 61.4° above the horizontal. The object hits the ground 7.55 s later. What is the absolute value of the difference in height between the launch point and the point where the projectile

42. ## math

standard form (4.98x10^110)x(1.82x10^82)

43. ## English

I have a question about writing my thesis for my paper. The topic was war as a social disease and the three body paragraphs were Dissection & Numeration, Statement of Conflict/Problem/ and Solution, and Statement of Root Principle? How would I form my

44. ## Social Studies

When I'm finish writing four paragraphs (2 paragraphs to support a political issue in Missouri) and (2 paragraphs to not support that issue in Missouri.) Would it be ok it someone could check it thanks see you soon!!

45. ## Algebra Word Problem

COULD SOMEONE PLEASE HELP ME WITH THIS PROBLEM!!!!!!!! Television Sets. What does it mean to refer to a 20-in TV Set? Such units refer to the diagonal of the screen. A 20-in TV Set also has a width of 16 inches. What is its height what is the height of a

46. ## Micro Economics

An increase in the consumer's income will do all of the following, except shift the budget line away from the origin increase the horizontal intercept increase the vertical intercept change the slope of the budget line I think it is shift the budget line

47. ## Child Care

In which of the following situations do you,as a caregiver,act as a role model for prosocial behavior? A.You remind Josha to hang up his coat. B. You help Michael to clean up the box of crayons he dropped. C. Y ou create a corner in which musical

48. ## Chemistry

Why is the benzene molecule represented as " a flat cyclohexane with a ring inside?"

49. ## CHemistry

Why do cis and trans isomeric compounds exhibit different properties?

50. ## Chemistry

What is the difference between hydration and hydrogenation reactions?

51. ## Chemistry

How many millimeters of a 15.0%, by mass solution of KOH(aq)(d = 1.14 g/ml ) are required to produce 26.0 L of a solution with pH = 11.40?

I am currently studying for the cbest exam in all three areas, math, reading and writing. Does anyone have any current information that would help better prepare for these tests.

53. ## math

I'm trying to solve by completing the square but i always get stuck at the end.. 3x^2-6x+2=0 3(x^2-2x)+2=0 3(x^2-2x+1-1)+2=0 3(x-1)^2 -1 =0 3(x-1)^2=1 now what do i do?... the answer is supposed to be x=3+-(square root)of3-> the whole thing over 3

54. ## Chemistry

Name an isomer of pentane (that is not cyclic) and write down its structure.

55. ## physics

I'm having trouble getting the answer for the 2nd and 3rd questions. # A soccer ball is kicked from the ground. When it reaches a height of 5.93 m, the velocity is v=6.45i+7.46j m/s. 1. Determine the maximum height that the ball reaches. (the right answer

56. ## PHYSICS!

A projectile is fired with an initial speed of 32.5 m/s at an angle of 61.4° above the horizontal. The object hits the ground 7.55 s later. What is the absolute value of the difference in height between the launch point and the point where the projectile

57. ## biology

how do Cnidarians move?

58. ## physics!!

You are a secret agent and find that you have been pushed out of an airplane without a parachute. Fortunately, you are wearing a large overcoat (as secret agents often do). Thinking quickly, you are able to spread out and hold the overcoat so that you

59. ## chemistry

there are a number of differently collored molecules present in the spinach. Explain what roles these molecules might serve in photosynthesis

60. ## Chemistry

I am studying dimensional analysis right now, and I get most of it, but I don't understand how to solve this problem: 5982 ox./pt=BLANK g/ml. I'm not sure how you do dimension analysis with units per units like this one. Thanks!!

61. ## Geography

what are the pros and cons about a sweatshop

62. ## Chemistry

What is the purpose of a nuclear reactor?

63. ## Social Studies Opinion

Could you read this article and tell me who's opinion you go for (my mom thinks that there giving money for something else in St. Louis but my dad thinks there giving it to highway 141 who's opinion do you go for my mom' or dad's here's the article.) City

64. ## chemistry

How do I solve this for c? Ka = (0.02c)(0.02c)/(c-0.02) 1.7x10^-5=(0.02c)(0.02c)/(c-0.02) Thanks.

65. ## Chemistry

Can you please look at my repost. I made an error in my question, so now I need your help for a different part of the question. :) Thanks. -Sadie

66. ## Algebra

Chris takes out two loans. He borrows \$800 more from a credit union that charges 12% interest than from a bank that charges 15% interest. If his interest payments total \$420 annually, how much does he borrow at each rate?

67. ## philosophy

what is whole/part logic according to Socrates, and how does it differ from whole/moment logic? I'm not sure if it is about that the whole needs parts or if the moment needs parts. Im confused. If you can help thanks.

68. ## Science

why is water essential to all life?

69. ## Social Studies (Check my 4 paragraphs)

If you need to you may want to read the article that says, "City goes hungry" again because that's what I wrote about. If you could when your finish could you give me a letter grade. Thanks City goes hungry Supporting this article will be very difficult

70. ## Alg

(2x/2x) + 1 == 1?

71. ## osmotic pressure chemistry.

I thought I was answering: http://www.jiskha.com/display.cgi?id=1234647827

72. ## science - help needed

What drives the motor in a roller coaster? Is it electromagnetic force or electricity?

73. ## genology

How does a scientist tell if a valcanoe is active or inactive and what is the criteria

74. ## CHEM help needed

how do i find the Volume of Atoms within Unit Cell in(Å^3)? I think it has something to do with avogadros number but i do not know exactly...so far i know that the volume of the unit cell is 47.045881 Å^3. PLEASE HELP

75. ## simple math

is there any trick I can use to solve the question below without expanding: 2^3 + 2^4