Questions Asked on
November 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

    asked by Tooler
  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

    asked by Katy
  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

    asked by David
  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

    asked by Angie
  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

    asked by yareli
  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

    asked by Anonymous
  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

    asked by T.C.
  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?

    asked by Wes
  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

    asked by joe
  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

    asked by anita
  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?

    asked by Mariam
  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?

    asked by tom
  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

    asked by HELP
  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

    asked by David
  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?

    asked by Bob
  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

    asked by Anonymous
  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

    asked by Angie
  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?

    asked by Angie
  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

    asked by ANITA
  21. PHYSICS

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

    asked by Josie
  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

    asked by Josie
  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,

    asked by Serenity1
  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?

    asked by LH need help please
  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...

    asked by Serenity1
  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

    asked by Terri
  27. Marketing

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

    asked by Violet McKnight
  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

    asked by Katy
  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.

    asked by Anonymous
  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

    asked by joe
  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?

    asked by Anonymous
  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

    asked by Angie
  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.

    asked by Angie
  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

    asked by Netta
  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.

    asked by joe
  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

    asked by Haffmeister
  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

    asked by Shalece
  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?

    asked by Collin
  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

    asked by Angie
  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

    asked by Angie
  41. Business math

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

    asked by Dawn
  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

    asked by kim
  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)

    asked by Please, help me!
  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

    asked by Katie
  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

    asked by Terri
  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

    asked by Anonymous
  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.

    asked by joe
  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?

    asked by Anonymous
  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.

    asked by michelle
  50. hummanites

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

    asked by sela
  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

    asked by nick
  52. Trigonometry

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

    asked by Dave
  53. Trigonometry

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

    asked by Dave
  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.

    asked by Diana
  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

    asked by Sara
  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)

    asked by Angie
  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.

    asked by tatiana
  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

    asked by Terri
  59. Trigonometry

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

    asked by Dave
  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

    asked by Dave
  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

    asked by Dave
  62. Algebra 1 (Reiny or Kuai)

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

    asked by Please, help me!
  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=

    asked by Terri
  64. PreCal

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

    asked by Terri
  65. math

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

    asked by Serenity1
  66. math

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

    asked by eryka
  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

    asked by Williams
  68. math

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

    asked by Serenity1
  69. math

    calculate: 6% + 1.2 * 8%

    asked by Serenity1
  70. math

    please calculate: 6% + 1.2 * 8%

    asked by Serenity1
  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,

    asked by Anonymous
  72. Social Studies

    I need a (positive) quote about life in the New York colony from a settler's point of view from 1600's. And the name of the person who said that, to prove it was a real colonist.

    asked by Victoria
  73. English

    We are reading lord of the flie and I need some opinions. My question is do you think that Ralph should be counted guilty and set on trial for Simon's death? Why or why not?

    asked by Dolly