Questions Asked on
August 6, 2014

  1. PHYSICS

    A 15g bullet is fired horizontally into a block of wood with a mass of 2.5 k and embedded in the block. Initially the block of wood hangs vertically and the impact causes the block o swing so that its center of mass rises 15cm. find the velocity of the

    asked by Anne
  2. Math

    One model of Earth's population growth is , where t is measured in years since 1990, and P is measured in billions of people. Which of the following statements are true?

    asked by Brian
  3. Physics

    2) A child sits on a merry-go-round, 1.5 meters from the center. The merry-go-round is turning at a constant rate, and the child is observed to have a radial acceleration of 2.3m/s^2. How long does it take for the merry-go-round to make one revolution?

    asked by Anonymous
  4. statistics

    Suppose x is a uniform random variable with c=10 and d=60. Find the probability that a randomly selected observation exceeds 30.

    asked by kara
  5. algebra

    is 3.27 a rational or irrational number

    asked by samantha
  6. PHYSICS

    a constant force of 6.00N acts on a 3.00kg object for 10.0s. what are the changes in the objects momentum and velocity?

    asked by EMMA
  7. math corrections

    I got a few questions wrong and i would like some explanations on these question: 2. A pair of pants sells for $6 more than 75% of its price of the pants? A.$12 B.$18 C.$20 D.$24 E.$36 Choice E is wrong. 4. What is the wall thickness, inches, of a tube

    asked by vincent
  8. physics

    a 1.2 kg ball drops vertically onto the floor, hitting with a speed of 25m/s. it rebounds with an initial speed of 10m/s. a) what impulse acts on the ball during the contact? b) if the ball is in contact with the floor for 0.20 s, what is the magnitude of

    asked by sam
  9. help please!

    1.after carefully constructing and double checking all of your slides, you're ready to preview your presentation. you're on the fourth slide, but you need to see the whole presentation as one unbroken flow. what button should you use to view the whole

    asked by cali
  10. life orientation

    factors that cause teenage pregnancy

    asked by kgothatso
  11. math

    A jar contains 20 marbles: 4 red, 6 white and 10 blue. If you remove 1 marble at a time, randomly, what is the minimum number that you must remove to be certain that you have at least 2 marble of each color? I guessed the answer was 18 and it was correct

    asked by john
  12. statistical analysis

    The number of vehicles passing through a pharmacy drive-up line with two windows during each 15-minute period was recorded. The results are shown below. Find the median number of vehicles going through the line in a fifteen-minute period 16 8 24 22 30 19

    asked by kdizzle
  13. math

    Ahmed earns $1.50 for every video game he sells. When he sells one carton of 30 video game, he earns an additional $10. What is the minimum number of video games he has to sell in order to earn $450?

    asked by Sharon
  14. physics

    1. Two carts, one twice the mass of the other, experience the same force for the same time. What is their difference in momentum? What is their difference in kinetic energy?

    asked by Anonymous
  15. Calculus-Math

    Complete the table without using the Quotient Rule. Function y=2x^(7/2)/x Rewrite y= Differentiate y'= Simplify y' =

    asked by Lorine
  16. anonymous

    The forms used in your coding area cost $100.00 per one thousand forms for the first 2,000 and $50 for every one thousand thereafter. If you need to order 5,000 forms, what is the total cost?

    asked by Anonymous
  17. physics

    a ball of mass 5kg is dropped from a height of 78.4m,the time taken by the ball to reach the ground is?

    asked by numan
  18. chemistry -repost

    Still can't figure this one out-- sorry for reposting, this is the last post, if someone has time to review this question and see if they can figure out how the textbook got 1.0x10^-7 seconds Iodine combines to form I2 in liquid propane solvent with a

    asked by Nancy
  19. math

    The approximate distance,S, in feet that an object falls in t seconds when dropped from a height can be found by using the formula S = 16t^2.In 8 seconds, the object will fall a. 256 feet b. 1,024 feet c. 1,084 feet d. 2,048 feet e. 15,384 feet please

    asked by thomas
  20. Physics

    A hunter holds a 3kg rifle and fires a bullet of mass 5g with a muzzle velocity of 300m/s. What is the final kinetic energy of the bullet and the riffle?

    asked by Benson mb
  21. SCIENCE

    A 1.5 kg book on top a shelf has a PE (Potential Energy) of 29.4 J. How high is the shelf?

    asked by RAIZA
  22. Math- urgent

    A golf ball can travel 170 mph. This is 10/7 times the fastest speed recorded for a hockey puck. What is the record speed for a hockey puck? Make and equation and solve.

    asked by Sarah
  23. PHYSICS

    a marksman fires a bullet(mB=5.00g) horizontally with a velocity of 300.m/s from a rifle(mR=3.00kg)What is the recoil velocity of the rifle?

    asked by EMMA
  24. statistics

    If 1,000 students take a test that has a mean of 40 minutes, a standard deviation of 8 minutes, and is normally distributed, how many would you expect would finish in between 24 and 48 minutes?

    asked by pablo
  25. Physics

    1) A car moving along a straight stretch of road at 60 mph [26.7 meters/sec]. The driver makes slams on his breaks locking them so that the car skids to a stop. Assume a constant braking force due to friction, and a kinetic friction coefficient of 0.70

    asked by Anonymous
  26. Check my answer please!

    I think its decades Jill enjoys reading about American history, especially the last 40 years, or four _____________, of the nineteenth century. A. centuries B. millennia C. decades D. eras

    asked by Matt
  27. GEN 499

    My theme is underage drinking...can someone explain this to me Explain how academic knowledge impacts the social elements and institutions of both local and global communities. Assess how the principles of active citizenship could impact the contemporary

    asked by Shay
  28. Life Science, Geography, BSTD's and Mathematics

    im in GRADE10, im doing those subjects: maths, lyf science, geog and bstd's. So I need help about which job i can get for doing those subjects?

    asked by Praiseworth Thobeka Ntombela
  29. summer math

    1.Sharon drove 188.3 miles to see a softball game. If she was driving for 3 1/2 hours,what was her average rate of speed? 2.Kat worked 23 hours last week babysitting. She earned $126.50. What was her rate of pay?

    asked by minecraft
  30. statistics

    You can answer any questions from the questions on an exam. In how many different ways can you choose the questions, assuming that the order in which you choose the questions is irrelevant?

    asked by randy
  31. PHYSICS

    3) A 10.0 kg object is hanging by a massless rope in an elevator that is traveling upward. The tension in the rope is measured to be 75.0 N. What are the magnitude and direction of the acceleration of the elevator?

    asked by Anonymous
  32. Please check this :D

    Tyler wrote a paper describing life in England in the eighteenth _________, from ______ to ______. I think its A. A. century; 1801, 1900 B. decade; 1701, 1800 C. century; 1700, 1799 D. century; 1701, 1800

    asked by Matt
  33. english

    write a analogy paragraph "the process of reading a good book"

    asked by fatima
  34. reading

    may cause drowsiness alcohol may intensity this effect. use oare when operating a car or dangerous machinery.which of the following is logical conclusion based on

    asked by Anonymous
  35. PHYSICS

    when a mass of 2.5kg string is attached to a spring it stretches 42cm. a) find the constant of the spring 'k' b) how much force is required to stretch the spring 50cm? c) how much energy is stored in the spring when stretched 0.35cm?

    asked by EMMA
  36. math

    I have some problems with these questions: 3. A hat was priced at $10.80. During a sale, the hat sold for $9.18. What was the rate of discount on the hat? 4. A man's tax on his home is $1,952. The tax rate is $3.20 per $100 of assessed value of the home? I

    asked by vincent
  37. Physics

    We have a projectile launched upward with an initial horizontal velocity of 20 m/s and an initial vertical velocity of 30 m/s. 1. What is the actual initial speed of the projectile? 2. What happens to the horizontal component of the velocity as the

    asked by Annika
  38. Interpersonal Communication

    How does confidence,hard work, unorganization and shyness relate to Interpersonal Communication? I need some example from chapter 1 and 2 from Reflect and Relate 2nd Edition by Steven McCornack. Need help before the end of the day.

    asked by Branden
  39. SCIENCE

    A 1.5 kg book on top a shelf has a PE of 29.4 J. How high is the shelf?

    asked by RAIZA
  40. Geomotrey

    What is the area of a regular pentagon with a side length of 9.4 feet and an apothem length of 6.5 feet?

    asked by orlando
  41. biology

    If a microscope has a 40× objective lens in place and a 15× eyepiece lens, the magnification of the system under these conditions is

    asked by oihln
  42. Math

    Explain how knowing that that 5 divided by 8 equals = .625 helps you write the decimal for 4 5/8

    asked by Anonymous
  43. math

    A refrigerator was marked down in a price from $249.50 to $199.60 during a sale. What was the rate of discount?

    asked by vincent
  44. Economics

    . A firm has prospective sales of $50 million, fixed costs of $60 million, and variable costs of $40 million. What does the firm do (a) in the short run? (b) in the long run?

    asked by Mike
  45. math

    what is thevolume of a rectangular prism with side lengths 15.8m,24.5m and 4.2m? round to the nearest cubic meter.

    asked by minecraft
  46. help (check)

    I think its (at a beach cottage) Which words make up the prepositional phrase in this sentence? Her cousins often spend the whole summer at a beach cottage.

    asked by Matt
  47. math

    x square plus 12X plus 4 equals 0 what is the value of x

    asked by eva
  48. PHYSICS

    what work must a diesel engine in an 18,000kg truck do to increase its speed from 30.m/s to 40 m/s in 5.0s? what average force did the engine exert? what power was needed (in horsepower)

    asked by EMMA
  49. physics

    calculate the amount of work it takes to increase a cars speed from 10mph to 30 mph and from 50mph to 60mph. Is more work required for 10mph to 30mph?

    asked by sam
  50. Geometry

    Find 2 cos(x/2) sin(x/2) when x = -π/6. I know that cos(x/2) = +- sqrt(1-cosx)/2 and sin(x/2) = +- sqrt(1+cosx)/2, but how to use this identity I'm not entirely sure. Please help.

    asked by Denis
  51. science

    how to measure length accurately using meter scale?

    asked by faria
  52. surface processes on earth

    What is the most significant factor that ontros yhe development of soil.

    asked by Anonymous
  53. Physics

    Average velocity

    asked by Siyabonga ngcobo
  54. Algebra

    Find the number of decibels for the power of the sound given. Round to the nearest decibel. A rocket engine, 2.68 cross product 10−5 watts/cm2

    asked by Viola
  55. math

    3.6 + 1.9

    asked by coolguy
  56. Psyc, statistics

    Introduction to Hypothesis Testing In an article entitled “Science and ethics in conducting, analyzing, and reporting psychological research” in the journal Psychological Science (1994), psychologist Robert Rosenthal examines the relationship between a

    asked by Lyndsay
  57. math test review

    7. Given that w=7r+6r+5r+4r+3r. Which of the terms listed below may be added to w to the resulting sum will be divisible by 7 for every positive integer r? A.7r B.6r C.5r D.4r E.3r

    asked by vincent
  58. math

    A plot of land has a side length of 47ft.What is the perimeter?

    asked by minecraft
  59. Math

    John has 5 computer games. Julian has twice as many computer games as John. How many computer games do they have in all?

    asked by Jessy
  60. math

    Nia found the following prices for shorts:$25 $28 $19 $20 $18 $19 $32 $29.find th mean,median,and mode for the prices

    asked by minecraft
  61. sci

    How to prepare 1mol conc. Sol

    asked by Anonymous
  62. sci

    How to prepare 1mol conc. Sol

    asked by Anonymous
  63. Math

    1/4(8y+4)-18

    asked by Keya
  64. math

    44-(4x+5)< 2(x+2)+x solve

    asked by Janelle
  65. math

    A student worked V hours on Monday W hours on Tuesday X hours on Wednesday Y hours on Thursday and Z hours on Friday. What is the average (arithmetic mean)

    asked by lovea
  66. math

    please find it's factors 2x^3+5x^2+4x+1 thanks

    asked by chen
  67. Physics

    What is elastic collision

    asked by Benson mb
  68. biology

    doing a biology project and they want us to figure out how long it takes to cook 6 different foods at 5 different temperatures and gather 30 separate data points. They want us to identify an x(independent) and a y(dependent) variable that can be recorded

    asked by ava
  69. Psychology

    what motivates a person's behavior, determinism or conscious beliefs about oneself?

    asked by Jossie
  70. math

    2012 32 32 is divided by 7 then find the remainder

    asked by binomial theorom
  71. Math

    The question says When the square of a certain number is diminished by 5 times.. What does diminished by mean?

    asked by Lisa
  72. physics

    a man with a 45kg mass dove 12m from a building into 0.32m of water. a)what was his kinetic energy when he hit the water? b)what average net force was exerted on him when he stopped?

    asked by sam