1. physics

    A block slides a distance d down a frictionless plane and then comes to a stop after sliding a distance s across a rough horizontal plane. What fraction of the distance s does the block slide before its speed is reduced to one-third of the maximum speed it
  2. Physics

    A 67.5 kg sprinter exerts a force of 775 N on the starting block which makes a 20 degree angle to the ground. a) What was the horizontal acceleration of the sprinter? b) If the force was exerted for 0.340s, with what speed did the sprinter leave the
  3. physics

    Q: A block A of mass 0.5 kg can slide on a frictionless incline of angle 30o and length 0.8 m kept inside an elevator going up with uniform velocity 2m/s. Find the time taken by the block to slide down the length of the incline if it is released from the
  4. Math

    In Kelly's career on the basketball team, she made 7 out of every 10 free throws. Last season, she made 168 free throws. How many free throws did she attempt?
  5. Chemistry Stoichiometry

    Sulfuric acid can dissolve aluminum metal according to the following reaction. Suppose you wanted to dissolve an aluminum block with a mass of 25.7 . How many grams of H2 gas would be produced by the complete reaction of the aluminum block?
  6. physics

    A 0.0160-kg bullet traveling horizontally at 396 m/s strikes a 3.95-kg block of wood sitting at the edge of a table. The bullet is lodged into the wood. If the table height is 1.06 m, how far from the table does the block hit the floor?
  7. Fin- Management

    David purchased a $100,000 participating whole life policy. The annual premium is $2,280. Projected dividends for the first 20 years are $15,624. The cash value after 20 years will be $35,260. If the premiums were invested at 5 percent for 20 years, the
  8. math

    Jewel uses 1/8 lb of cheese to make a sandwich in the cafeteria where she works.She purchased a 5 lb block of cheese earlier this week and has already used 1 3/4 lb from the block.Which equation could be used to find n, the number of sandwiches that jewel
  9. math

    The number of years of education of self-employed individuals in the United States has a population mean of 13.6 years and a population standard deviation of 3.0 years. If we survey a random sample of 100 self-employed people to determine the average
  10. History

    I've been looking for the answers to questions on my study guide for a test I will have for a couple hours and I got a lot of them. However, there are some that I still have a hard time finding. Here are the questions. If I can be told even some of these,
  11. physics

    A bullet of mass 0.08kg is fired horizontally into a 10kg block which is free to move. If both bullet and block move with a velocity of 0.6m/s after the impact, find the velocity with which the bullet hits the body
  12. Physics

    A bullet with a mass of 10 imbeds itself in a wooden block of mass 3990g and is free to move. If the speed of the block and bullet together is 50 cm/s just after the impact what was the original speed of the bullet ? what was the right formula to use.? pls
  13. Math

    A pipe has an outside diameter of 1.25 inches and an inside diameter of 0.75 inches. If Kelly hacksaws the pipe in two, what fraction of the pipe cross sectional area is sawn when the blade breaks through to the inside?
  14. Math

    Instead of using the mean, how could you use the median to explain that ages are older?
  15. humanities

    who are the people involved in dark ages?
  16. history

    When were the colonial ages in North America?
  17. 5th grade

    where would i find middle ages help
  18. history

    1. When does the Spanish middle ages end?
  19. History

    What happened during the European dark ages?
  20. Bussiness

    Assigment: write a business letter according to the background. Background:Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of Human
  21. math

    1)what is the smallest integer greater than 1 that leaves a remainder of 1 when divided by any of the integers 8,9, and 10? 2) The square root of the difference of (B^2 /16) and (b^2/25) 3) Mr. Baker is 30 years old when his son is 4 years old. In how many
  22. finance

    equipment cost $20,000 and is financed over a period of five years at an interest rate of 12%...What is the monthly payment...What is the loan balance at the end of four years and how much interest will have been paid on the loan after five years?
  23. PHYSICS HELP

    m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with
  24. physics

    Two blocks of masses M and 3M are placed on a horizontal, frictionless surface. A light spring is attached to one of them, and the blocks are pushed together with the spring between them. A cord initially holding the blocks together is burned; after this
  25. PHYSICS

    m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with
  26. PHYSICS HELP

    m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with
  27. Physics

    A bullet whose mass is 0.0015kg leaves a 5kg leaves a 5kg rifle at a muzzle velocity of 800 m/s. It strikes a 7kg block of wood and becomes embedded in it. After the bullet hits the rock, what is the speed of the bullet/ block system?
  28. Physics

    h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 7 3 9 3 5 9 3 ok heres the problem in a picture h t t p : / / i m g 1 9 2 . i m a g e s h a c k . u s / i m g 1 9 2 / 4 5 0 0 / c a p t u r e x x w . j p g ok I called the 4 kg
  29. Algebra

    Greta invests $10,000 in an investment that pays 3% interest, compounded annually, for the first three years, then 9% interest, compounded annually, for the last three years. Rui invests $10,000 in an investment that pays r% for all six years. The two
  30. Finance

    Someone in the 36 percent tax bracket can earn 9 percent annually on her investments in a tax- exempt IRA account. What will be the value of a one- time $ 10,000 investment in 5 years? 10 years? 20 years?
  31. Need Help Math

    5. Based on this pattern, h human years, how old is your dog in dog years? In other words, if given any number to figure out the age in dog years. Hint: (h-2) should be somewhere in your expression. I choose a large dog.
  32. College Physics

    A 26.5 kg block (m1) is on a horizontal surface, connected to a 6.90 kg block (m2) by a massless string. The frictionless pulley has a radius R = 0.096 m and a moment of inertia I=0.080 kgm2 m2 is hanging straight down from the pulley over the edge of the
  33. Physics

    A 14.3 gram bullet embeds itself in a 2.823 kg block on a horizontal frictionless surface which subsequently collides with a spring of stiffness 378 N/m.  The maximum compression of the spring is 13.5 centimetres.   a)  What was the initial speed of the
  34. Physics

    A 12.8 gram bullet embeds itself in a 2.370 kg block on a horizontal frictionless surface which subsequently collides with a spring of stiffness 487 N/m. The maximum compression of the spring is 11.0 centimetres. a) What was the initial speed of the bullet
  35. physics

    Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.24.
  36. physics... last one

    Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.63. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.23.
  37. physics

    The weightless horizontal bar in the figure below is in equilibrium. Scale B reads 4.00 kg (N.B. as you know, the scale should read N, but no one told the manufacturer). The distances in the figure (which is not to scale) are: D1 = 9.0 cm, D2 = 8.0 cm, and
  38. statistic

    A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.4 years, and standard deviation of 1.6 years. The 10% of items with the shortest lifespan will last less than how many years? Give your answer to one decimal
  39. Physics

    Hi,I need help with question 1) There were twins on our planet earth. They were physicst. One of them were sent to space at his 20 year. When he comes back after 20 years of stay in the space he was 40 years but his brother who stayed on earth was 60 years
  40. medical

    20. Suppose the statute of limitations for a particular state is 3 years and the age of majority in that state is 21. If you have medical records for a 13-year-old girl, how long should you maintain them? A. 3 years B. Until she's 21 C. Until she's 24 D. 8
  41. physics

    A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (muk = 0.43). What is its final speed? (m/s) Thanks for suggeting the following solution. The block starts with an initial speed of 18.0 m/s.Does it have any
  42. physics

    A block of mass 2 kg is connected to a freely hanging block of mass 4 kg by a light and inextensible string which passes over pulley at the edge of a table. The 2 kg mass is on the surface of the table assumed to be smooth. Calculate the acceleration of
  43. physics emergency

    m1 = 2.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 40 N/m) as shown in the figure above. The other side is connected to the block m2 = 3.6 kg that hangs vertically. The system starts from rest with
  44. Simple interest

    Charlotte borrows $9000 over 5 years to buy a second hand car. The loan must be repaid over 5 years at 12% p.a. simple interest calculate the monthly repayment if the payments are spread equally over the 5 years.
  45. finance

    I give you a flat yield curve from 0 to 4 years: 2%. You have a five year swap contract that pays annually and want to use it to extend the curve to 5 years. How low can the swap par rate go before forward between 4 and 5 years goes negative?
  46. finacne

    cYou think that in 15 years it will cost $214,000 to provide your child with a 4-year college education. Will you have enough if you take $75,000 today and invest it for the next 15 years at 5%? d. If you can earn 5%, how much will you have to save each
  47. Social Studies

    3. How long is the term of a senator? 2 years 4 years 6 years****** Life 4. What is the core function of the executor branch? To make laws To interpret laws To carry out laws To declare laws unconstitutional********
  48. math

    Assume the average height and weight of a female in your math class is 5'5" and 140 pounds. Use this information to write a variation equation then use it to find the weight of the female below if they had the same body type as the average female. Round
  49. Geometry

    Let x equal the age, in human years, for a dog that is 2 years old or older. For each of your chosen breeds, write an expression to model its age in dog years. [Hint: Use (x-2) in each expression.] the dogs are 2yrs: 23 yrs old 3yrs: 27 yrs old 4yrs: 31
  50. Math

    Let x equal the age, in human years, for a dog that is 2 years old or older. For each of your chosen breeds, write an expression to model its age in dog years. [Hint: Use (x-2) in each expression.] the dogs are 2yrs: 23 yrs old 3yrs: 27 yrs old 4yrs: 31
  51. maths

    megan borrows £5000 to buy a cat at a rate of 8% over 3 years. how much does she have to pay over the three years? if she pays the loan back every month over three years ,how much is her monthly payment? if there was an arrangement fee of £500 for the
  52. math

    megan borrows £5000 to buy a cat at a rate of 8% over 3 years. how much does she have to pay over the three years? if she pays the loan back every month over three years ,how much is her monthly payment? if there was an arrangement fee of £500 for the
  53. Math

    Kelly has a 2.89 GPA after 54 credits. She is taking 16 credits this quarter. What must her GPA be this quarter to raise her ovarall GPA to 3.0
  54. physics

    A 500g block is released from rest and slides down a frictionless track that begins 2m above the horizontal. At the bottom of the track, where the surface is horizontal, the block strikes and sticks to a light spring with a spring constant of 20.0N/m. Find
  55. math

    the half life of the carbon isotope C14 is about 5700 years. A. about how many years does it take 1000 grams of this substance to decay to 500 grams? B. about what percent of the original amount would you expect to find after 1000 years?
  56. age problem (math)

    Nila is now x years old. 3 years ago, her brother ricky was twice as old as she. Write ricky's age 10 years from now in terms of x. (with solution pls... thanks...)
  57. accounting

    Current spot rate curve is given by 1 year 2 years 3 years 4 years 0.5% 1% 1.4% 2.1% Provide a forecast of expected spot rates one year from today.
  58. MATH

    If C dollars are deposited in an account paying r percent annual interest, the amount after x years is A+C(1+r)*. Approximate the amount in the account after x years, when C=$100.00, r=19%, and x-15 years.
  59. math

    jake put $ 600 in the bank for 4 years at 2.5% interest a) how much interest will he earn after three years b) what is the total amount in his bank account at the end of three years
  60. physics

    Pleaseee help explain how to draw the free body diagrams for this problem!!! Two blocks with masses m1 = 10.9 kg and m2 = 79.3 kg, shown in the figure (in the figure the 79.3kg block(m2) is on a flat surface, the 10.9kg(m1) block is pinned against the
  61. physics

    Two blocks, A and B (with mass 50 kg and 100 kg, respectively), are connected by a string, as shown in Figure P5.64. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is µk = 0.25.
  62. Physics

    A 1.07 kg block slides across a horizontal surface directly toward a massless spring with spring constant 4,794 N/m. The surface is frictionless except for a rough patch of length 0.461 m that has coefficient of kinetic friction 0.358. The initial velocity
  63. business statistics

    1-A randomized block design ANOVA has five treatments and four blocks. The computed test statistic (value of F) is 4.35. With a 0.05 significance level, the appropriate table value and conclusion will be? 2-A randomized block experiment having five
  64. physics

    A light spring of constant k = 156 N/m rests vertically on the bottom of a large beaker of water (Fig. P9.34a). A 4.10 kg block of wood (density = 650 kg/m3) is connected to the spring and the block-spring system is allowed to come to static equilibrium
  65. Statistics Homework

    Statistics Question: Years to Earn Bachelor's Degree Years to Earn Bachelor's Degree: Listed below are the lengths of time (in years) it took for a random sample of college students to earn bachelor's degrees (based on data from the National Center for
  66. Physics..=> drwls - I need your help

    I need help seeing if my thoughts are correct and how to do some things. Block 1 of mass 0.200 kg is sliding to the right over a frictionless elevated surface at a speed of 8.00 m / s. The block undergoes an elastic collision with stationary block 2, which
  67. physics

    A large uniform block rests horizontally on two vertical supports(one support at the left end of the block and another at a distance from the other end) and has a weight hanging from its other end. The block has a mass of 100 kg and a length of 2 meters.
  68. Math

    Darisa is 10 years older than Adahun. 10 years from now, Darisa would be twice as old as Adahun was 10 years ago. How old would be after 12 years?
  69. Math

    In five years,Emma will be three years more than twice as old as her son. Five years ago,she was two years less than five times, as old as her son. How old Emma now?
  70. Physics

    If the co-efficient of static friction for a 5 kg rubber block is 0.3 how much more force is required to lift the block than to start it sliding? I worked out force to get it sliding is 14.7 N (5*9.8*.3) but not sure about the upward force to lift it.
  71. PHYSICS

    A 4 kg block is pushed along the ceiling with a constant applied force of 85 N that acts at an angle of 55 degrees with the horizontal. The block accelerates to the right at 6 m/s^2. determine the coefficient of kinetic friction between the block and the
  72. Physics

    At an instant the block(M = 33kg) is moving down the slope. Angle between slope and floor = 33deg Force Pulling up the slope 49N at 38deg to the slope What is the acceleration of the block up the slope if the kinetic coefficient of friction is 0.5? My
  73. ehglish

    i need to know if i need to add any puctuation?Descriptive paragraph Deborah Paul A loyal Friend My loyal friend Mary Ellen is 48 years old with shoulder length black hair and dark brown eyes. Mary Ellen works full time as an RPN in a nursing home taking
  74. math find balance compound interest

    i need help i need to find the balance in each compound interest account: $1400 after 3 years at 5.5% i got: B= P (1 + r) t =1400 (1 + .055)3 I am stuck and don't know how to do this #2 $1800 after 11 years @ 6.0% #3 $900 after 10 years @ 4.62% #4 $2500
  75. Physics

    1.A bus travels 400 m between two stops. It starts from rest and accelerates at 1.50 m/s^2 until it reaches a velocity of 9.00 m/s. The bus continues at this velocity and then decelerates at 2 m/s^2 until it comes to a halt. Find the total time required
  76. government

    if no presidential candidate wins a majority of the electoral votes, the president is chosen in a. the senate b. both houses of congress c. the supreme court d. the house of representatives d.
  77. Social studies

    "He has dissolved representative houses repeatedly, for a posing with manly firmness his invasions on the rights of the people." a) who is "he" b) how would this contribute to American animosity towards Britain?
  78. History

    Which of the following would Not describe Mississippian Indians? A) grew only corn for food****** B) made art and jewelry C) constructed mounds and lodge houses D) had different ranks in their society
  79. Algebra

    (I'm so lost with all this algebra so can someone please help me? I have tried to put some answers in so please tell me if any of my answers are wrong and help with the ones left blank). 2. As you are leaving the community, you notice another new community
  80. physics

    Physics: maximum force that can be applied to move an object? What is the maximum force F which can be exerted? Given: The friction between the block with mass 14 kg and the wedge with mass 16 kg is 0.19 . The surface between the wedge with mass 16 kg and
  81. Earth Science

    1. We start with 400 atoms of Uranium-238. How many remain after 4.5 billion years? _______ After 9 billion years? _______ After 13.5 billion years? ________ 2 . How long will it take for ½ of the original amount of Rubidium-87 to decay? _______ 3.
  82. math

    A little help please, thanks. Kelly conducted an experiment. In each trial she flipped a coin and rolled a number cube that has sides labled 1 to 6. The results are shown above. What is the experiementl probability that her next flip will be tails? Trial
  83. Finance

    a client comes to you for an investment advice on his 500,000 winnings from the lottery. he has been offered the following options. what would be the best option 6% compounded interest quarterly for 5 years or 8% compounded annually for 5 years or 14.5%
  84. Physics

    Find an expression in terms of M, mu, and theta for the speed of waves on the string.Express your answer in terms of the variables M, mu, theta, and appropriate constants. The picture shown is just of a block with mass m on an inclined frictionless surface
  85. physicis

    A block of mass m1 = 4.00 kg slides along a frictionless table with a speed of 16.0 m/s. Directly in front of it, and moving in the same direction, is a block of mass m2 = 5.00 kg moving at 7.00 m/s. A massless spring with a spring constant k = 1220 N/m is
  86. College Algebra

    (I'm so lost with all this algebra so can someone please help me? I have tried to put some answers in so please tell me if any of my answers are wrong and help with the ones left blank). 2. As you are leaving the community, you notice another new community
  87. English

    (Thank you for your help in many ways. Would you look at the sentence? Is 'the same' in apposition with 'about 20 degrees C'? ) e.g. The temperature in cave houses is always the same, about 20 degrees C.
  88. Math Help Please!!!

    A couple purchased a house and signed a mortgage contract for $110,000 to be paid in “every second week “ installments over 25 years, at 3.0 %. The contract stipulates that after 3 years the mortgage will be renegotiated at the new prevailing rate of
  89. math

    A. Brad is 12 years older than Sam . If Brad were 8 years older than he is now. he would be twice as old as Sam. How old is Sam now? B. Barrie is now 2 years older than Krista. In 15 years Barrie's age will be 2 years more than twice Krista's age now. How
  90. Annuities and sicking funds

    Janet Woo decided to retire to fla. in 6 years. What amount should Janet invest today so she can withdraw 50000.00 at the end of each year for 20 years after she retires? What will be the balance in the account 2 years after the last deposit. I guess i am
  91. Math

    Kelly makes fruit juice each morning. She uses 2 1/3 pints of strawberries and 1 2/5 pints of grapes in her juice. If she doubles her recipe, how many more points of strawberries than pints of grapes will she use?
  92. grammar

    They were talking, though I couldn't hear what they were saying because they were on the far side of the gallery. They stopped in front of a case and I could see their faces quite clearly. They stood there looking at each other, not talking any more, and I
  93. Physics Inertia!

    Rank from fastest to slowest. a)a solid ball rolling down a ramp without slipping b)a cylinder rolling down the same ramp without slipping. c)a block sliding down a firctionless ramp with the same height and slope. Select all that apply. The ball is
  94. Social Studies

    What was it like in the day of a Knight during the MIddle Ages
  95. math

    A couple has 4 children ages 9,6,4,and 1.What is the probability that they are all girls.
  96. history

    Was Tudor the last royal house of the Middle Ages?
  97. biology

    how can i find the circulatory system of a marlin? please help me. i've been looking 4 ages....
  98. math

    Why could the mean of the data set below be misleading? ages of teachers: 29, 38, 39, 26, 29, 29, 39, 77, 38, 29
  99. Math

    Martha is twice as old as her younger brother. The sum oh their ages is 36. How old are they?
  100. statistics

    What level of measurment would i use for ages of the members of congress