1. physics

    Starting from rest, a 5.0 kg block slides 2.5 m down a rough 30.0 degrees incline in 2.0s. Determine (a) the work done by the force of gravity. (b) the mechanical energy lost due to friction, and (c) the work done by the normal force between block and

    asked by Anonymous on October 23, 2007
  2. College Physic

    A 1.54 x 10-2-kg block is resting on a horizontal friction-less surface and is attached to a horizontal spring whose spring constant is 129 N/m. The block is shoved parallel to the spring axis and is given an initial speed of 8.84 m/s, while the spring is

    asked by David on December 11, 2016
  3. Physics

    A 4.07 x 10-2-kg block is resting on a horizontal frictionless surface and is attached to a horizontal spring whose spring constant is 144 N/m. The block is shoved parallel to the spring axis and is given an initial speed of 10.5 m/s, while the spring is

    asked by Elle on May 2, 2014
  4. Physics

    A 4.05 x 10-2-kg block is resting on a horizontal frictionless surface and is attached to a horizontal spring whose spring constant is 121 N/m. The block is shoved parallel to the spring axis and is given an initial speed of 8.65 m/s, while the spring is

    asked by BrookeNeed on November 30, 2016
  5. physics

    A wood block, after being given a starting push, slides down a wood ramp at a constant speed. What is the angle of the ramp above horizontal? The fact that there aren't any numbers involved here and a certain angle is required confuses me. I know it

    asked by Alura on September 13, 2010
  6. Physics

    A 4.07 x 10-2-kg block is resting on a horizontal frictionless surface and is attached to a horizontal spring whose spring constant is 144 N/m. The block is shoved parallel to the spring axis and is given an initial speed of 10.5 m/s, while the spring is

    asked by Elle on May 2, 2014
  7. Physics

    A small block of mass m1 = 0.500 kg is released from rest at the top of acurved-shaped frictionless wedge of mass m2 =3.00 kg, which sits on a frictionless horizontal surface as inFigure P9.60a. When the block leaves the wedge, its velocity ismeasured to

    asked by Marie on November 14, 2011
  8. Geography / Social Studies

    how are people in modern american societies ruled by geographic conditions? Consider modes of travel, how food is acquired, and types of houses built

    asked by Anonymous on October 27, 2008
  9. 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?

    asked by halp on November 3, 2016
  10. government

    if no candidat receives a majority of the electoral votes, the president is chosen by a. both houses of congress b. the house of representatives c. the senate d. a new popular vote a.

    asked by jere on January 15, 2008
  11. Finances and Math

    Can someone please help me solve these problems or help me find an easy formula?..No matter how many times I read or try calculating I can't get it please help me..I would really appreciate it thank you.. Calculate the future value of the following: $5,000

    asked by Anna on February 18, 2010
  12. history

    When were the colonial ages in North America?

    asked by Anonymous on September 20, 2008
  13. humanities

    who are the people involved in dark ages?

    asked by Hansel on September 4, 2012
  14. History

    What happened during the European dark ages?

    asked by Alam on September 4, 2012
  15. history project

    how to i get started on a middle ages shield?

    asked by shyanne on December 16, 2008
  16. art

    During the middle ages who was most likely to own a manuscript or book?

    asked by taylor on November 9, 2018
  17. Math

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

    asked by Reeses on March 9, 2017
  18. history

    1. When does the Spanish middle ages end?

    asked by Ullysses on October 6, 2014
  19. Social Studies

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

    asked by John on March 6, 2008
  20. social studies

    in the south, by 1863, what were the ages for conscription ?

    asked by angie on January 13, 2010
  21. Physics

    A block of mass 0.229 kg is placed on top of a light, vertical spring of force constant 4665 N/m and pushed downward so that the spring is compressed by 0.093 m. After the block is released from rest, it travels upward and then leaves the spring. To what

    asked by beavis on March 17, 2012
  22. physics

    In an experiment to find the speed of 2.4g bullet, it was fired into a 650g block of wood at rest on a friction free surface. If the block(and bullet) moved off with an initial speed of 96cm s-1, what was the speed of the bullet? plz help the teacher gave

    asked by flirtyme on January 13, 2018
  23. Art

    Thank you very much, Writeacher. I'm posting the first part of my paraprase again because I failed to include the reference to the stanzas. 1) Dickinson’s poetic universe is characterized by personal deprivation. In particular, in poem 579, “I had been

    asked by John on June 10, 2012
  24. Physics

    A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. Force is 8.67N. Also mass

    asked by Andrea on March 1, 2008
  25. 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

    asked by Anonymous on March 5, 2012
  26. Statistics

    A sample of 53 night-school students' ages is obtained in order to estimate the mean age of night-school students. = 25.7 years. The population variance is 12. (a) Give a point estimate for mu. (b) Find the 95% confidence interval for mu (lower and upper

    asked by Megan on April 2, 2015
  27. physics

    Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. the hanging block has a mass of 16 kg and the one on the plane has a mass of 8

    asked by emm on January 18, 2010
  28. 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

    asked by KEVIN on January 13, 2011
  29. algebra

    2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have

    asked by Devin on March 31, 2010
  30. Math

    Average height of a species of tree (in feet) after a certain number of years Years----------Height 1 ------------- 2.1 2 ------------- 3.2 3 ------------- 6.8 4 ------------- 7.3 5 ------------- 11.2 6 ------------- 12.6 7 ------------- 13.4 8

    asked by Kaai97 on December 14, 2015
  31. Algebra I

    Average height of a species of tree (in feet) after a certain number of years Years----------Height 1 ------------- 2.1 2 ------------- 3.2 3 ------------- 6.8 4 ------------- 7.3 5 ------------- 11.2 6 ------------- 12.6 7 ------------- 13.4 8

    asked by SAM on November 12, 2017
  32. Math

    Average height of a species of tree (in feet) after a certain number of years Years----------Height 1 ------------- 2.1 2 ------------- 3.2 3 ------------- 6.8 4 ------------- 7.3 5 ------------- 11.2 6 ------------- 12.6 7 ------------- 13.4 8

    asked by Kaai97 on December 14, 2015
  33. Math

    Average height of a species of tree (in feet) after a certain number of years Years----------Height 1 ------------- 2.1 2 ------------- 3.2 3 ------------- 6.8 4 ------------- 7.3 5 ------------- 11.2 6 ------------- 12.6 7 ------------- 13.4 8

    asked by Kaai97 on December 14, 2015
  34. 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

    asked by Scott Ingraham on April 12, 2008
  35. physics

    a person lifts a 4.3 kg centimeter block a vertical distance of 1.10m. and then carries the block horizontally a distance of 10.0m. How much work is done by the person? How much work is done by gravity?

    asked by Kalynn on January 14, 2013
  36. Math

    Allison has a set of letter block each block is a unit cube. What is the volume of the figure she can build out of only vowels?what is the volume of the figure she can build out of all the letters?

    asked by Anonymous on March 12, 2013
  37. physics

    a person lifts a 4.3 kg centimeter block a vertical distance of 1.10m. and then carries the block horizontally a distance of 10.0m. How much work is done by the person? How much work is done by gravity?

    asked by Kalynn on January 14, 2013
  38. Physics

    The two blocks in the figure, of mass m and M respectively, are not attached, but there is a coefficient of static friction u between them. The surface below the heavier block M is frictionless. What is the minimum force magnitude F required to keep the

    asked by John on May 16, 2011
  39. physics

    A block of mass 3 kg initially at rest is pulled along a friction less horizontal surface with a force of 4N. The speed of the block at t=2s is a)4/3 m/s b)8/3m/s c)4 m/s d)8m/s e)24m/s For this problem this is a graph. Some of the points on the graph are

    asked by me on December 29, 2006
  40. Social Studies

    1. like the United States, Canada's government has a_____ structure, splitting power between the national and regional (or provincial) governments. ''federal" 2. In Canada and the United States, income distribution is "spread unequally in Canada and

    asked by dori on November 4, 2018
  41. algebra

    Cat Years 1 3 4 6 7 Human Years 13 33 43 63 73 What is the meaning of the slope? Write the slope-intercept form of the equation for the line of fit. Use linear interpolation and your line of fit to estimate the number of human years which will correspond

    asked by Joshua on January 17, 2011
  42. math

    Mrs koh is now 58 years old and corrine is 28 years old. How many years ago was mr skoh 6 times as old as corrine?

    asked by jazel on March 26, 2017
  43. atlantic

    A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will last less than 10 years?

    asked by claire on April 6, 2017
  44. Help please! Math

    A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will last less than 10 years?

    asked by Katalina on January 12, 2014
  45. 7th Grade Math

    Mayla's mother is 3 times as old as Mayla. Eight years ago her mother was 7 times as old as Mayla. What are their ages now? A: Mayla 10; her mother 30 B: Mayla 12; her mother 36 C: Mayla 13; her mother 39 D: Mayla 14; her mother 42 I think the answer is B.

    asked by Missy on September 30, 2008
  46. Physics/Math

    A 3.0 kg block, initially in motion, is pushed along a horizontal floor by a force F of magnitude 18 N at an angle = 45° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25. (Assume the positive direction is to the

    asked by COFFEE on February 10, 2007
  47. 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,

    asked by Stefan on March 20, 2016
  48. Physics

    Two blocks of masses 40.0kg and 20.0kg are stacked on a table with the heavier block on top. The coefficient of static friction is 0.600 between the top and bottom blocks and 0.300 between the bottom block and the table. What is the required magnitude of a

    asked by Eric on October 31, 2006
  49. PHYSICS

    A block of mass m lies on a horizontal frictionless surface and is attached to one end of a horizontal spring (spring constant k) whose other end is fixed. The block is initially at rest at the position where the spring is unstretched (x = 0) when a

    asked by Anonymous on October 21, 2011
  50. 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

    asked by Lexus on May 13, 2016
  51. 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

    asked by rachel on June 16, 2011
  52. algebra

    At a pet store, Rhonda paid $11.50 for 3 dog bowls and 4 bones. Kelly $13 for 2 dog blows and 8 bones. How much will Andrew pay for 4 dog bowls and 2 bones?

    asked by Anonymous on January 25, 2014
  53. 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

    asked by Akram on May 23, 2012
  54. 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

    asked by LeAnn/URGENT on November 16, 2009
  55. 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

    asked by LeAnn/Needs turned in within an hour on November 17, 2009
  56. Math

    When Juan divides each of five consecutive integers by his age , the sum of five remainders he gets is 32 . When Nikita ,several years older , divides each of a different set of five consecutive integers by her age , the sum of the five remainders she gets

    asked by Ereny on February 3, 2015
  57. 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

    asked by Ben on December 15, 2011
  58. 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

    asked by Lesliam on August 11, 2009
  59. 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.

    asked by clueless on November 10, 2010
  60. 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.

    asked by Chan on October 26, 2009
  61. 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 = 0.28.

    asked by tom on March 15, 2012
  62. Pysical Features

    Can you give me a breif 2 page summary of all the physical features of Africa Kelly , we don't do your homework for you. Here are sites that will give you good information. http://library.thinkquest.org/16645/overview.shtml

    asked by Kelly on January 14, 2007
  63. 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

    asked by Alphonse on November 22, 2012
  64. 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

    asked by Jalopy on November 29, 2012
  65. 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

    asked by ~christina~ on February 26, 2008
  66. 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

    asked by thmas on February 20, 2014
  67. 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.

    asked by 아, 깹송~ on February 8, 2017
  68. physcs

    A string is wrapped around a uniform solid cylinder of radius 3.10 cm, as shown in the figure. The cylinder can rotate freely about its axis. The loose end of the string is attached to a block. The block has mass 16.3 kg, and the cylinder has mass 11.2 kg.

    asked by asefa on November 30, 2009
  69. 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

    asked by Ash on December 9, 2017
  70. 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

    asked by mohit on August 5, 2015
  71. 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

    asked by andrea on February 22, 2011
  72. Social Studies

    How is New York City not changed from the days when it was called New Amsterdam? A. Its streets still have walls. B. Its houses still look the same. C. It is still a major trading center. D. It still has mostly Dutch residents. My answer- K

    asked by Dddd47906 on July 3, 2014
  73. 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

    asked by Khaliyl R Testman on September 6, 2018
  74. 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.

    asked by jere on January 11, 2008
  75. Identifying a Fallacies

    I can't seem to figure out which fallcy this would be, is anyone familiar and could tell me which one for the following statement? 'To parents who think it's a good idea to share parenting, I say, "OK then, let the child stay in the house and you two swap

    asked by Help on April 3, 2012
  76. Physics

    There is a block resting on a table attached to a hanging mass around a pulley. Assume a value of g = 10 m/s2. If there is no friction, and the mass on the table has a value of 5.0 kg and the hanging mass has a value of 1.0 kg, what is the value of the

    asked by Emily on October 28, 2014
  77. journalism

    You have recently been hired as the news director for a local news station. It’s time to prep for your first newscast. Your newscast will have five blocks and will be 60 minutes long. You need to cover the following in your newscast: Scores from last

    asked by joey on December 3, 2018
  78. 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

    asked by joe on November 6, 2011
  79. Physics

    A machine in an ice factory exerts 3.06 ✕ 102 N of force to pull a large block of ice up a frictionless slope at constant speed. The force is applied parallel to the slope, and the weight of the block is 1.39 ✕ 104 N. What is the angle of the slope?

    asked by Anonymous on January 13, 2014
  80. 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

    asked by mary on November 4, 2011
  81. 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

    asked by joe on November 3, 2011
  82. 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

    asked by Anonymous on October 31, 2009
  83. 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?

    asked by Lucas on January 15, 2014
  84. 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

    asked by joe on November 6, 2011
  85. 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

    asked by shahd on November 10, 2015
  86. 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

    asked by shahd on November 10, 2015
  87. science

    suppose you have 100grams of radioactive plutonium-239 with a half-life of 24,000 years. how many grams of plutonium-239 will remain after: A)12,000 years B)24,000 years C)96,000 years how do i do this??????

    asked by matt on September 10, 2007
  88. math

    Consider that the age, x, of a unicorn in human equivalent years can be given by the formula f(x) = - 0.001618x4 + 0.057326x3 – 1.1367x2 + 11.46x + 2.914. When a unicorn is 2.5 years old, what is its age in human equivalent years? What about when it is

    asked by tan on July 17, 2011
  89. Maths

    Peter invests $12500 for 5 years at 12 percent per annum,compounded monthly foe the first two years, and 14 percent per annum compounded simiannually for the next three years. How much will Peter receive after five years?

    asked by Randi on April 30, 2011
  90. algebra

    Consider that the age, x, of a unicorn in human equivalent years can be given by the formula f(x) = - 0.001518x4 + 0.067326x3 – 1.4367x2 + 12.46x + 2.914. When a unicorn is 2.5 years old, what is its age in human equivalent years? What about when it is

    asked by Jackster on March 8, 2011
  91. English

    1. You can't buy alcohol until you are twenty years old. 2. You can't buy drinks until you are twenty years old. 3. You can't buy wine until you are twenty years old. 4. You can't buy beeer until you are twenty years old. --------------------------- Are

    asked by rfvv on November 27, 2014
  92. 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

    asked by Cassie on April 2, 2009
  93. 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?

    asked by Sarah on February 8, 2010
  94. 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

    asked by alle on October 31, 2017
  95. Classical Mechanics Physics

    A block of mass m= 3 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=βt2, where β= 1.2 N/s2. We stop pushing at time t1=5 s [F(t)=0 for t>t1]. (a) First, assume

    asked by Anonymous on December 6, 2013
  96. Math

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

    asked by Jo-Anna on November 28, 2016
  97. 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

    asked by nadwa on September 29, 2015
  98. Nutrition.

    What are the nutritional needs of adult men and women between the ages of 19 to 65?

    asked by A.W. on March 2, 2009
  99. science

    how is the menan buttes likely to look in future geologic ages

    asked by cameron white on October 31, 2012
  100. SOCIAL STUDIES

    HOW DID THE ICE AGES INFLUENCE HUMAN MIGRATION

    asked by DAVID on September 17, 2009