# Questions Asked onAugust 14, 2010

1. ## phys102

a copper wire has a diameter of 1.02mm,the wire carries a constant current of 1.67A,the density of the free electrons is 8.5X10^28 e/m^3.calculate the current density and drift velocity

2. ## statistics

If a data set has a mean of 10.0 seconds and a standard deviation of 2.0 seconds, what is the Z score corresponding to the time of 4.0 seconds?

3. ## chemistry

6.00g of gold was heated from 20.0 degrees celcius to 22.0 degrees celcius. how much heat was applied to the gold?

4. ## economics

If the elasticity of demand for cocaine is −.2 and the Drug Enforcement Administration succeeds in reducing supply substantially, causing the street price of the drug to rise by 50%, buyers will spend less on cocaine.

5. ## microeconomics

For each of the following scenarios, decide whether you agree or disagree and explain your answer. a. If the elasticity of demand for cocaine is −.2 and the Drug Enforcement Administration succeeds in reducing supply substantially, causing the street

6. ## math

On a roulette wheel are 36 slots numbered 1 through 36 and 2 slots numbered 0 and 00. You can bet on a single number. If the ball lands on your number, you receive 35 chips plus the chip you played. a. What is the probability that the ball will land on 17?

7. ## chemistry

Home many drops of 0.1M HCl is needed to neutralize 10mL of 1M NaOH?

8. ## economics

Every year Christmas tree vendors bring tens of thousands of trees from the forests of New England to New York City and Boston. During the last two years, the market has been very competitive; as a result, price has fallen by 10 percent. If the price

9. ## college physics

you find that it takes a horizontal force of 160 newtons to slide a box along the surface of a level floor at constant speed . the coefficient of static friction is 0.52, and the coefficient of kinetic friction is 0.47. if you place the box on a dolly of

10. ## economics

Week 3 Homework Please answer the following questions: 1. The following information describes the value Lori Landlord places on having her five apartment houses repainted. She values the repainting of each apartment house at a different amount depending on

11. ## trigonometry

From lookout tower 80ft. high, a man observes from a position 6.5 ft. below the top of the tower that the angle of elevation of the top of the certain tree is 12deg40mins and the angle of depression of its base is 70deg20mins. If the base oof the tower and

12. ## Biology (muscle response)

Suppose you are asleep and the doorbell rings. You stumble to your feet and move toward the door, open it and speek with your visitor. Think of the many changes occurring in your body as you awaken and respond. How does the three types of muscle tissue

13. ## college

What are 4 archetypes in the novel Walk Two Moons?

14. ## math

The following are the amounts (to the nearest dollar) paid by 25 students for textbooks during the fall term: a. Draw an ordered stem and leaf plot to illustrate the data. b. Construct a grouped frequency table for the data, starting the first class at

15. ## Maths

Could someone help me with this question please? Which angle between 0° and 360° has the same cosine as the angle 55°? Thanks in advance

16. ## maths trig

if p and q are the solutions of the equation atanx+bsecx,show that tan(A+B)=2ac/(a^2-c^2)

17. ## medical

which one of the following statements is an example of hearsay? a)i saw the doctor administer the injection.b)i checked the patients blood pressure three times.c)the report said the patient died on january 15.d)the report was on my desk when i arrived for

18. ## algebra

The area of a rectangle is 21 square meters. Find the length and width of the rectangle if its length is 4 meters greater than its widith. using Area of a rectangle = (width)(Length)

19. ## pre-calculus

Find the designated term of the binomial expansion. 5th term of (4a+2b)^3 This is done without using Pascal's Triangle.

20. ## chemistry

What mass of solute is needed to prepare 140 mL of 0.560 M KCl? how do i work this out?

Which of the following would be classified as an informative or possitive message? A. A request for information B. An announcement of a policy that reduces benefits C. A memo for the file recording actions and rationales D. A letter to an employer

22. ## trigonometry

A surveyor made two sections of the railroad bridge, both at 210 meters in length. Suppose that the maximum of elevation of each section is 75deg. When the bridge is closed, the water level is normally 13 meters below the bridge. a. When the bridge is

23. ## Math

Hi, what is the gradient of a line that has an angle of inclination of 75°? Any help appreciated

24. ## Math

Simplify: f(x)=sqrt (16-x^4)/ sinx This is to evaluate a limit, but I don't know if I can simplify the above equation. Because I tried to get rid of the radical in the numerator but I ended up with a radical in the denominator. >< Help

25. ## economics

I need to review a n example of an essay on a 700-1,050 word essay on one good that you have had experience purchasing and the good I chose is online college explaining factors that could cause possible chandes in supply and demand. Determine at least 2

26. ## AED/200

This isn't due until sunday(August 15, 2010). Can you please help me with this paper. Ideas would be great!! Write a 700-1,050 word paper describing your experience with the new technology tool. Include the following in your paper: 1. A description of the

27. ## geometry

The length of a rectagle is 9 centimeters more than half the width. Find the legth if the perimeter is 60 centimeters.

28. ## physics

If you are in a smooth riding bus that is going 50 km/hr and you flip a coin vertically, what is the horizontal velocity of the coin in midair relative to the ground?

29. ## English

What are some good intepretive discussion questions for the book This Boy's Life by Tobias Wolff

30. ## legal antropology

I am a student Master in Public administration, but one part legal antropology is included. it is difficult for me to understant can somebody help me with some exam question regarding the semi autonomous social fiel in relation to the state, property or

31. ## Math

The following equation has a positive and a negative solution. z-1/z+1 = 2/z+4 I need to find the positive solution, any ideas please?

32. ## Maths

Please help!!! The mass of a particular substance is known to grow exponentially at a rate of 1.5% per day. Its initial mass was 230 grams and, after t days, it weighed 325 grams. The equation modelling this growth is 230×1.015 t  =  325. Use

33. ## chemistry

how many joules of heat are required to heat a 75 gram silver spoon from 20celcius to 30 celcius

34. ## Microeconomics

1.Trade liberalization leads to a "race to the bottom" in environmental standards

35. ## math

If the lottery with odds as in exercise 15 has a prize of \$13,567,290, is buying a ticket for \$1 a fair deal? Explain your answer.

36. ## Statistics

. Using Excel, find the t-score that corresponds to the following Confidence Levels and Sample Sizes: a. 95% with n = 25 b. 96% with n = 15 c. 97% with n = 21 d. 91% with n = 10

37. ## algebra

Need mathamatical expression. The simple interest rate, given that the principal is 3x, the rate is 6%, and the time is 1 year. im so lost with this math question.

38. ## math

(e^(e^x)) = 2 find x.

39. ## US History II

In the conflict of Harry S. Truman v. Douglas MacArthur did Truman fear war with China or USSR if he used atomic bombs?

40. ## US History II

What was the Gold Standard in William Jennings Bryan v. William McKinley? - that gold was only standard to redeem paper money. What does this mean? Thank You.

41. ## math

Sam has a savings account that increased in value over a twelve month period from \$8765.00 to \$9006.04. He made no deposits or withdrawals in that time. What percent interest did he receive for the 12 month period?

42. ## Math 116

Solve by the substitution method. 3x+8y=57 x=67-8y

43. ## chemistry

it is 0.1M of acetic buffer equal to sum up of 0.05M of acetic acid and 0.05M of sodium acetic ?

44. ## Math

How would I calculate the area of a sector of a circle with radius 2 m that subtends an angle pi/3

45. ## economics

If the demand for a good has unitary elasticity, or elasticity is −1, it is always true that an increase in its price will lead to more revenues for sellers taken as a whole.

46. ## mgt 415

What is the relationship between controversy, decision-making, and creativity?

47. ## marketing

List three questions a marketing manager might want to ask. Then, provide answers, incorporating marketing math concepts.

48. ## COLLEGE MATH

What percentage of 40 IS 120? I used the formula: 40 =x*120 -40 -40 x= 80% to me this seems way to high as 40 goes into 120 three times making it 33%. Am I using the wrong formula? According to the text book, it seems to be the right answer, but does not

49. ## math

a rectangle is fixed at 17cm. what width will make the perimeter greater than 80cm

50. ## math

Use the formula from Exercise 107( W=91.4-(10.5+6.7Sqrt(x)v-0.45v)(457-5t)/110 ) to determine who will feel colder: a person in Minneapolis at 10°F with a 15-mph wind or a person in Chicago at 20°F with a 25-mph wind.

51. ## math

can anyone help me with the problem i posted a while ago???????

52. ## criminal Justice

Why are K-9 units important in fighting crime? Explain.

Explain why sears and walmart cant create a trendy counercoulture image

54. ## algerdra

shoes were on sale for 52.83 and that is at 25% off what is the regular price before the sale

55. ## Psychology

How have you used the scientific process (unsystematic observation, building theories, and evaluating propositions) in your life to better understand your personality?

56. ## medical

most medical malpractice cases are related to. a.failure to inform b.errors in treatment c.abandonment d.negligence

57. ## Psychology Observations

Observations • Write a 200- to 300-word response to the following: How have you used the scientific process (unsystematic observation, building theories, and evaluating propositions) in your life to better understand your personality? Provide an example

58. ## Algebra I

1. Imagine you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation a. What does the number 3.03 represent? b. Find C(2). c. Find C(9). d. For the average

59. ## US History II

What was the dispute over the form of National Currency between William Jennings Bryan and William McKinley? -was it about the Gold standard and coinage of silver?

60. ## algebra

solve for variable h s equals 2 pie rh +2 pie r squared

61. ## MicroEconomics

Have shown my answers to these 14 problems,that I thought were correct. Do you mind letting me know what you think. Thank you so much. Anything will help!! I have placed an ****. By the ones I think are right!! 7. If equilibrium exists: (Points: 3) all

62. ## physics

A pendulum has a mass of 3-kg, a length of 2.2 meter, and swings through a (half) arc of 30 degrees. To the tenth of a Joule, what is its maximum Kinetic Energy? I just need a very simple, straightforward method of solving this problem. Unfortunately my

63. ## college physics

in which direction will we move loop(produced in magnetic field) to force current move in reverse direction?

64. ## English

1. He has three hours soccer practice every day. 2. He has three hours' soccer practice every day. 3. He has three-hour soccer practice every day. (Which one is grammatical?)

65. ## math

how do you find the equation of a line knowing (-5,-5) and (-2.-3) so the slope will be 2/3...

66. ## math157

How many three-symbol codes (letter-number-number) can be made from the letters S, P, Y and two digits from the set {0, 1, 2, …,9} without repetition? I think I am suppose to match each letter with a number until I exhaust all possibilities but I am not

67. ## Math

lim (as x approaches infinity) (x^2-1)/(x^2+1) How would you solve that by using algebra? I can simplify the above because it is difference of squares. But then what about the bottom

68. ## college math.

write an algebraic expression for the given information. The area of a rectangle whith sides "b" yards and b-6yards. Area of a rectangle is: A=LW When I work the formula I put this: A= LW A=B*(B-6) This seems to be the right answer, just want to make sure.

69. ## Algebra

solve the equation q+4 /5 + q -2 /2 =6/5

70. ## algebra 2

I'm stuck on this one problem. The directions say: Solve the following leaving the sq. rt. in it's simplest form: sq.rt of 33+ sq.rt of 96 - sq.rt of 3 = I think it can't be simplifed---am I correct? (the directions did say that some of the problems can't