# Questions Asked onNovember 30, 2013

1. ## Science

Three light beams encounter a medium. One light ray is reflected, while the other two are absorbed. How can the medium be described? Transparent Translucent Opaque or Clear In satellite communication, does the satellite... Receive radio signals Prevent

2. ## Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

3. ## elementary statistics

A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be

4. ## Physics

A 200g block of copper at 90o C is dropped into 400g of water at 27o C contained in a 300g glass beaker at 27o C. What is the final equilibrium temperature of the mixture? cCu = 0.0924 cal/g°C cglass = 0.2 cal/g°C cwater = 1 cal/g°C

5. ## physics

An infinitely long wire carrying a current of 2 A is bent at a right angle as shown in the Figure. What is the magnetic field a point P, 10 cm from the corner?

asked by James urgent need help
6. ## calculus (optimization)

a rectangular study area is to be enclosed by a fence and divided into two equal parts, with the fence running along the division parallel to one of the sides. if the total area is 384 square feet, find the dimensions of the study area that will minimize

7. ## Health (Ms. Sue)

1. Summarize how common substances can trigger allergic reactions. A: Common substances can trigger allergic reactions when immune systems cells encounter a foreign particle, sending out chemical signals that cause the body to react? 2. Identify how people

8. ## Chemistry

Hello! I am having a little difficulty answering these two questions on my homework, I was wondering if anyone could please help me out! Thank you! 1) Consider the following balanced chemical equation for the neutralization reaction of calcium hydroxide

9. ## Math

A 10-FOOT LADDER IS PLACED AGAINST A VERTICAL WALL OF A BUILDING, WITH THE BOTTOM OF THE LADDER STANDING ON LEVEL GROUND 6 FEET FROM THE BASE OF THE BUILDING. How HIGH UP THE WALL DOES THE LADDER REACH?

10. ## us hist

A main weakness in the plan to confiscate land from large plantations to give to freedmen was that A) the large plantations were the main source of employment for freedmen. B) freedmen did not want the land because they did not want to be tied down. C) it

11. ## chemistry

a saturated solution of barium chloride at 30c contains 150g water. how much additional barium chloride can be dissolved by heating this solution to 60c

12. ## Physics

A roller-coaster car has a mass of 500 k when fully loaded with passengers. If at point a the forces exerted by the truck on the car is 15000 What is the acceleration at point A?

13. ## math

ken spend 1/5 of his money on a dictionary. he gives \$21 to his brother and has 1/2 of his money left. how much money does ken have left?

14. ## Statistics

Of the parts produced by a particular machine, 1.5% are defective. If a random sample of 11 parts produced by this machine contains 2 or more defective parts, the machine is shut down for repairs. Find the probability that the machine will be shut down for

15. ## elementary statistics

A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group of students is different, and so he examines a random sample of midterm grades (listed below). At 0.05 alpha level can it be

16. ## physics

A steel section of the Alaskan pipeline had a length of 65.1 m and a temperature of 15.8 °C when it was installed. What is its change in length when the temperature drops to a frigid -31.2 °C?

17. ## Health (Ms. Sue)

1. What are two ways that society could deal with future concerns about genetic information? A: ? 2. Identify how keeping person health records can help a person cope with hereditary diseases. A: Keeping personal health records can help a person cope with

18. ## Physics

Analyzing Roller Coaster Performance Using Conservation of Mechanical Energy At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to

19. ## Physics

Gas is confined in a tank at a pressure of 10.0 atm and a temperature of 15o C. If half of the gas is withdrawn and the temperature is raised to 65o C, what is the new pressure of the gas?

20. ## College Physics

At what frequency does the inductive reactance of a 42.0 µH inductor equal the capacitive reactance of a 42.0 µF capacitor? kHz

21. ## PHYSICS

The tension in the cable supporting a 4900N elevator is 3800N. What is the acceleration of the elevator?

22. ## PHYSICS

If a boy(500N) wishes to slide down a rope that has a breaking stand of 350N, then: (a) with what acceleration must it move downward in order to not break the rope. (b) if he slide 30m, how long will it take? (c) how fast will he be going before he hits

23. ## finance

Kuai, I need help in this part: Debt: 227,000 7.4 percent coupon bonds outstanding, 25 years to maturity, selling for 109 percent of par; the bonds have a \$1,000 par value each and make semiannual payments. Common stock: 8,500,000 shares outstanding,

24. ## physics

Two long, parallel wires carry current in the x-y plane. One wire carries 30 A to the left along the x-axis. The other carries 50 A to the right along a parallel line at y = 0.28 m. At what y-axis position in meters is the magnetic field equal to zero?

25. ## Finance

Debt: 223,000 7.0 percent coupon bonds outstanding, 25 years to maturity, selling for 107 percent of par; the bonds have a \$1,000 par value each and make semiannual payments. I need help finding the YTM...

26. ## PreCal

A trainee is hired by a computer manufacturing company to learn to test a particular part of a personal computer after it comes off the assembly line. The learning curve for an average trainee is given by N=200/4+21e^-0.1t a)How many computers can a

27. ## Marketing

As preserve makes headway into the larger retail chains, what challenges will it face?

28. ## Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

29. ## math

Assume the car can be purchased for 0% down for 60 months (in lieu of rebate). A car with a sticker price of \$42,250 with factory and dealer rebates of \$5,100 (a) Find the monthly payment if financed for 60 months at 0% APR.

30. ## us hist

The waning support of Northerners for Radical policy was due in part to A) the retirement of President Johnson. B)the activities of the Ku Klux Klan. C) the increasing fissure between northern and southern whites. D) their loyalty to the Democratic party

31. ## math

Suppose that an insurance agent offers you a policy that will provide you with a yearly income of \$60,000 in 30 years. What is the comparable salary today, assuming an inflation rate of 6% compounded annually?

32. ## Physics

A pair of eyeglass frames made of plastic with a coefficient of linear expansion of 1.30x10-4 (Cº ) -1 have circular lens holes of diameter 4.40 cm at room temp (20º C). To what final temperature must the frames be heated in order to insert lenses 4.42

33. ## Physics

Mars has a moon (Phobos) with an orbital period of 7.67 hours and an orbital radius of 9.4x106 m. Use Kepler’s 3rdLaw to estimate the mass of Mars.

34. ## physics

A brick of mass 1.19 kg is attached to a thin (massless) cable and whirled around in a circle in a vertical plane. The circle has a radius of 1.16 meters. The cable will break if the tension exceeds 45.0 Newtons. What is the maximum speed the brick can

35. ## us hist

Reconstruction was a period of A) judicial supremacy. B) political inaction and indifference. C) congressional supremacy. D) executive expansion C right ans.

36. ## physics

A 75 kg skier starts at rest on top of a icy inclined plane (with a 30 degree angle to the ground). He ends up going past the inclined plane and onto a flat ground. And comes to a rest. The coefficient of friction is .100. How long does it take for the

37. ## Physics

A rat with mass 0.5 kg is sliding down an inclined plane. The plane is at an angle of 34⁰ with respect to the ground, and the coefficient of friction between the rat and the plane is 0.2. Simultaneously, a cat is giving the rat a push UP the hill, with a

38. ## electricity

Two long, parallel wires carry current in the x-y plane. One wire carries 30 A to the left along the x-axis. The other carries 50 A to the right along a parallel line at y = 0.28 m. At what y-axis position in meters is the magnetic field equal to zero?

39. ## Physics

A regulation baseball has mass 145 g and diameter 22.86 cm. Will this ball float or sink in water? Vsphere = € 4 3π⋅r3

40. ## Physics

Two blocks are attached together with a piece of string. Block #1 (3 kg) slides along a rough horizontal surface and block #2 (2 kg) hangs off the end of the surface. If the blocks accelerate at 2.5 m/s2 in the directions shown, determine the tension in

Buy 2 pair of jeans at \$8.99 each and get 3 free. Calculate the markdown percent

42. ## statistics

Ala rge fleet of cars is maintained with an average of 26 mpg. 50 recent trips displayed a mean of 25.02 mpg and standard deviation of 4.1 mpg. At the 5% level of significance, is their evidence the company has failed to keep their fuel goals? I did the

43. ## Algebra 1 (Reiny or Kuai)

Write an equation in slope-intercept form for the line through two points. 1. (7,8) and (-7, 6) 2. (-1, 2) and (4, -23)

44. ## MATH :)

For each of the following measurements state the number of significant digits: A length of 2.3 meters A volume of 0.65 liters A time of 0.0004 secs A population of 65,000,000 A distance of 1.30 x 104 I got: 1. 2 2. 2 3. 1 4. 2 5. 2 Just need someone to

45. ## PreCal - repost

A trainee is hired by a computer manufacturing company to learn to test a particular part of a personal computer after it comes off the assembly line. The learning curve for an average trainee is given by N=200/4+21e^-0.1t How many computers can a trainee

46. ## probability

(a) Find P(121 ¡Ü X ¡Ü 139), the probability that a randomly chosen girl at the start of 1st grade is between 121 and 139 centimeters tall. (Round your answer to three decimal places.) P(121 ¡Ü X ¡Ü 139) = 1

47. ## us hist

All of the following components represent major objectives of Reconstruction except A) political B) social C) economic D) cultural is D right.

48. ## math

The temperature on one day in January for Phoenix, AZ, is 46 degrees Fahrenheit. On the same day in Barrow, AK, the temperature is -19 degrees Fahrenheit. What is the difference between these two temperatures?

49. ## Chemistry- DrBob222

0.2g of an organic sample W, analysed by combustion analysis results in 0.48g of CO2 and 0.1636g of H2O. We had a second sample 0.2g of W again producing 0.0618g of ammonia. Show that only C, H and N exist in W and find its emperical formula.

50. ## hummanites

Explain relative location. Give the relative location of the following: Texas, El Paso and The lonely mountain, bag end

51. ## algebra 2

The table that follows shows the relationship between the boiling temperature of water (°F) and the altitude (per thousand feet): Boiling Point of Water Altitude (1000 ft.) Temperature (°F) 8 197.6 4.5 203.9 3 206.6 2.5 207.5 Gemma and Tessa need to find

52. ## Trigonometry

Find the value of 3sec2.4. (Round to the nearest tenth.)

53. ## Trigonometry

Find the value of 3sec2.4. (Round to the nearest tenth.)

54. ## Spanish 2 Questions

Fill in the blanks with the correct reflexive pronoun. 1.) Prefieres cepillar _____los dientes. 2.) Necesitamos maquillar _____. 3.) No _____ acuesto a las nueve. 4.) Mis hermanos ____despiertan temprano. 5.) Elena y yo ____ duchamos.

55. ## math for liberal arts

construct a truth table to determine whether each argument is valid. Be sure to state whether it is valid or invalid with each question. 1) ~p v q p ____ triangle of dots p^~q

56. ## Physics

A 1-liter aluminum container at 20o C is filled with 0.975 liters of mercury at 20o C. If both the container and the mercury are heated, at what final temperature will the mercury completely fill the container? (Hint: this is a volume expansion problem)

57. ## college calculus

I don't know how to solve this indefinite integral with both limits as variables: ^x^3 ç (z^4+1)dz ⌄ln(x) If you could explain I'd appreciate it.

58. ## PreCal

A person deposits \$1000 in a bank account which pays 8% annual interest compounded continuously. Used formula A=Pe^in You get A=(1000)e^.08(1)=1000e^.08≈ 1000(1.08329) ≈ \$1,083.29 My question is how do you get 1.08329 from e^.08

59. ## Trigonometry

Sketch the curve represented by the parametric equations x = 3 cos θ and y = 3 sin θ for 0≤θ≤π

60. ## physics

A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? (Round to the nearest tenth of a second.) Remember: x = (v0 cos θ)t and y = h0 + (v0sinθ)t – 16

61. ## Trigonometry

A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? (Round to the nearest tenth of a second.) Remember: x = (v0 cos θ)t and y = h0 + (v0sinθ)t – 16

62. ## Algebra 1 (Reiny or Kuai)

Graph each function. 1. y = x^2 + 5 Which numbers should I choose as the x-values?

63. ## PreCal

This is a solved problem. Deposit \$1000 @ 8% compounded continuously. How many years before it doubles. Solved: Use A=Pe^.08 , so 2000=1000e^.08n then 2=e^.08n then take natural log (1n) of both sides. end up with 1n 2 = .08n so that n= 1n 2/.08 approx=

64. ## PreCal

Find all solutions to the equation, x-8(sqrt x)+16=0. Is x=16 the only solution?

65. ## math

I need help calculating: 67.95% * 15.60% + 27.98% * 6.65% (1-38%) + 4.08% + 6%

66. ## math

the inside of a bee's honeycomb looks like the hexagon, how many lines of symmetry does the shape have

67. ## Math.stat help :(

Consider the following hypothesis statement using alpha = .05, and data from two independent samples: Ho: µ1 - µ2 = 0 Ha: µ1 - µ2 not equal to 0 X1 = 237, X2 = 218 ¬1 = 54, ¬2 = 63 n1 = 42, n2 = 35 a) Calculate the appropriate test statistic and

68. ## math

Please calculate, I need help: [(600950000 / 884452900)(.1560) + (447000 / 884452900) + (247430000 / 884452900)(.0825)]

69. ## math

calculate: 6% + 1.2 * 8%

70. ## math

please calculate: 6% + 1.2 * 8%

71. ## Health (Ms. Sue)

1. Compare three types of hereditary diseases. A: Single-gene diseases occur when 1 gene out of the 30,000 to 40,000 genes in the body has a harmful mutation, whereas in complex diseases, more than one gene influences the onset of the disease. However,