1. Physics

    Starting from rest at t = 0 s, a wheel undergoes a constant angular acceleration. When t = 1.6 s, the angular velocity of the wheel is 5.9 rad/s. The acceleration continues until t = 19 s, when the acceleration abruptly changes to 0 rad/s2. Through what

    asked by Julia on November 4, 2015
  2. math

    Which three options are true about motion in a straight line. A. A particle which moves at an increasing velocity has a constant acceleration. B. If two particles always have the same velocity as each other, their separation does not change. C. A particle

    asked by clara on May 12, 2007
  3. PHYSICS HELP

    A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of

    asked by Anonymous on November 17, 2013
  4. Physics Classical Mechanics

    A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of

    asked by Anonymous on November 14, 2013
  5. Physics

    A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of

    asked by Chelsea on November 24, 2013
  6. Physics Gravitation Question

    Vesta, a minor planet in the Asteriod Belt between Mars and Jupiter, has a mean radius of 525 km and mass of 2.59 X 10^20 kg. The Dawn Spacecraft (m = 1240 kg) orbited Vesta in 2011 & 2012. A. Find the local acceleration due to gravity at the mean surface

    asked by Anon on November 5, 2016
  7. Biochemistry

    How do you calculate the free energy change for the acetyl phospahate hydrolysis in a solution of 2 mM acetate, 2 mM phosphate and 3 nM acetyl phosphate. The standard state free energy of hydolysis of acetyl phosphate is /\G = -42.3 kJ/mol.

    asked by nicki on October 5, 2010
  8. physics

    A ball rolls up a ramp and then back down again. The ramp is oriented so that the ball is rolling to the right as it rolls up the ramp. Assume that positive v and a vectors point to the right. Which statement is true about the ball's horizontal

    asked by Vicki on January 19, 2012
  9. econimic

    Command economies: A. Are considered a type of mixed economy B. Are considered a type of free market economy C. Oppose private property, free market pricing, competition, and consumer choice D. Encourage private property, free market pricing, competition,

    asked by jay on May 12, 2014
  10. enhaning self-esteem

    Help please. 2)according to many social scientists,adolescence ends for most people? A.when the physcial and intellectual changes of puberty have occurred. B.by the time the person reaches age 20. C.when they're most comfortable with and have a clear

    asked by jaylen on December 16, 2009
  11. Physics

    On a mass of 100 kg, a force of 120 N acts right and at an angle of 30 degrees to the horizontal. If the coefficient of sliding friction is .1 what is the acceleration of the mass? 100N* cos30 -(100sin30+mg)(.1)= m*acceleration does "m*acceleration mean

    asked by Tiff on August 24, 2006
  12. physics

    1. A ball moving horizontally clears a net 2 meters high. What maximum speed can it have if it is to fall within 5 meters of the net? 2.A pulley system lifts a load of 800 Newtons, 20 centimeters while the rope pulling it moves 100 cm. a. How much force

    asked by mimi on October 18, 2011
  13. Physics

    Draw a free body diagram and Apply Newton's 2nd law in both direction. 60 kg chair is pulled along a rough horizontal surface under the action of a 200N force 30 degrees up from horizontal, as shown the acceleration of the chair is 1.5 m/s^2. a) Determine

    asked by Matt on October 7, 2015
  14. Computers

    Can anyone help me solve this : Assume that you have a disc-system with 300 256-byte sectors pr. track and assume that the disc rotates with 800 rpm. How long time does it take to read a sector? The answer should be in microseconds. Search time isnt

    asked by Magnus on November 24, 2006
  15. Accounting

    I have completed all of my assignment except this one last question. I am having a heck of a time figuring out where to even start. Can anyone help me? The comparative year-end balance sheets of Sign Graphics, Inc., revealed the following activity in the

    asked by Lois on July 12, 2014
  16. Physics

    A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 290 km/h in a semicircular arc with a radius of 200 m. Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant

    asked by asher on December 15, 2015
  17. English

    1. So the necklace on his desk had to be the real diamond necklace. 2. So the necklace on his desk must have been the real diamond necklace. (Does #1 mean #2? What is the difference between them?) 3. He must be strong. 4. He has to be strong. (Are both

    asked by rfvv on October 12, 2013
  18. Physics Classical Mechanics

    A light inflexible cable is wrapped around a cylinder of mass m1 , radius R , and moment of inertia about the center of mass Ic . The cylinder rotates about its axis without friction. The cable does not slip on the cylinder when set in motion. The free end

    asked by A on November 7, 2013
  19. PHYSICS

    A light inflexible cable is wrapped around a cylinder of mass m1 , radius R , and moment of inertia about the center of mass Ic . The cylinder rotates about its axis without friction. The cable does not slip on the cylinder when set in motion. The free end

    asked by Anonymous on November 8, 2013
  20. Physics

    A 20 kg crate is placed on a horizontal conveyor belt. The materials are such that us = 0.47 and uk = 0.21. What is the maximum acceleration the belt can have without the crate slipping? If acceleration of the belt exceeds the value determined in part A,

    asked by Leanna on March 3, 2013
  21. Physics

    A 17 kg crate is placed on a horizontal conveyor belt. The materials are such that μs = 0.44 and μk = 0.21. A) What is the maximum acceleration the belt can have without the crate slipping? B) If acceleration of the belt exceeds the value determined in

    asked by Hayden on November 14, 2017
  22. physics

    A 20 kg crate is placed on a horizontal conveyor belt. The materials are such that μs = 0.6 and μk = 0.3. (c) What is the maximum acceleration the belt can have without the crate slipping? (d) If acceleration of the belt exceeds the value determined in

    asked by Kate on June 22, 2011
  23. electromagnetism

    Two identical bar magnets A and B are held at rest as shown and released to fall simultaneously. Magnet A as it falls passes through the center of a copper ring, magnet B does not. #9 (4 points possible) Which of the following statements is true? -

    asked by JuanPro on April 14, 2015
  24. Physics

    A target lies flat on the ground 3m from the side of a building which is 10m tall. A student rolls a ball off the horicontal roof of the building in the direction of the target. Air resistance is negligible. Te horizonal speed with which the ball must

    asked by Tammy on March 25, 2007
  25. managerial economics

    assuming that the firm's goal is to maximize present value of the profits in the subsequent 5 years, which of the following flows of profit would achieve that goal? Justify your answer. Note that the flows are represented by 5-tuples, i.e. five number each

    asked by sheila on February 14, 2011
  26. business math revised

    Bob makes his first $800 deposit into an IRA earning 7% compounded annually on the day he turns 27 and his last $800 deposit on the day he turns 35. (9 equal deposits in all.) With no additional deposits, the money in the IRA continues to earn 7% interest

    asked by lauren on February 10, 2011
  27. Physics

    At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the

    asked by mo on January 22, 2012
  28. Physics

    At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the

    asked by mo on January 22, 2012
  29. physics

    A car at the Indianapolis 500 accelerates uniformly from the pit area, going from rest to 260 km/h in a semicircular arc with a radius of 210 m. Determine the tangential and radial acceleration of the car when it is halfway through the turn, assuming

    asked by Eden on November 12, 2010
  30. Physics

    An object of mass m1= 2.90 kg placed ona. Frictionless, horizontal table is connected to a string that passes over a pulley and then is fastened to a hanging object of mass m2= 8.70 kg. Draw free- body diagrams of both objects. I've seen many people have a

    asked by Keef sosa on September 26, 2016
  31. Math

    David would like to buy a laptop computer and save 20 percent during sale. He uses his credit card to pay for it. David is counting on getting a lot of money in graduation presents from his parents' business associates. David knows that his credit card

    asked by Marquita on October 12, 2017
  32. Physics Help

    While a person is walking, his arms swing through approximately a 45° angle in .530s. As a reasonable approximation, we can assume that the arm moves with constant speed during each swing. A typical arm is 70.0 cm long, measured from the shoulder joint.

    asked by GG on February 17, 2012
  33. Physics

    While a person is walking, his arms swing through approximately a 45° angle in .530s. As a reasonable approximation, we can assume that the arm moves with constant speed during each swing. A typical arm is 70.0 cm long, measured from the shoulder joint.

    asked by GG on February 16, 2012
  34. american government

    the presidency is: a. an extaordinarily strong office with sufficient powers to enable the president to control national policy under virtually all circumstances. b. an inherently weak office in that presidents have almost no capacity to influence the

    asked by cindy on July 6, 2012
  35. physics

    The mean distance of the planet Neptune from the Sun is 30.05 times the mean distance of Earth from the Sun. a.) Determine how many Earth-years it takes Neptune to orbit the Sun. b.) The mass of the Sun is 1.99 x 10^30 kg, and the closest distance of

    asked by Michelle on December 17, 2008
  36. physics

    in Melbourne there used to be a huge shopping centre called "diamaru" built around an old "shot tower". hot lead globules were poured from the top of the tower which fell into a large pool of water at the foot of the tower. in this way spherical lead shot

    asked by Emma on June 15, 2007
  37. Chem

    The question is telling me that NaOH (24.00 grams) is diluted in water (750 mL). Find the pH and pOH. This is what I did so far: NaOH ---> Na+ + OH- NaOH: mass = 24.00 grams v= 750 ml = 0.750 L M= 40.00 grams/mol n= 0.6000 mol c= 0.800 mol/L Since NaOH

    asked by Lena on July 27, 2009
  38. Business

    which statement is false about Globaliztion? Free markets are effective than government rules or national boundries are increasing in importance. I think its A, that free markets are more effective than government rules.

    asked by Bryan on October 31, 2011
  39. Chem

    Why does sodium chloride not conduct electricity as a solid but when melted, does conduct electricity? Thanks Solid NaCl consists of a three dimensional array of Na^+ and Cl^-. Even though the ions are present, the ions are not free to move about; i.e.,

    asked by Sean on November 22, 2006
  40. english

    For my assignment I have to find an advertisement, analyze it, and write my interpretation of it. I've done this, but I'm coming out short on words for the assignment. And I feel like there's nothing else that I can mention. I'm supposed to write 500 words

    asked by y912f on October 13, 2010
  41. Physics

    A car travalling 90km/h, applies breaks with a force of 8400N to act on the 1050kg car. a) what is the acceleration of the car when the breaks are applied? b)how long does it take to stop. c) how far does the car travel while it is breaking? could anyone

    asked by Zam on June 10, 2007
  42. Physics :(( help please TT

    Ski boots are usually made with releasable bindings. This is done for safety – if you fall and your ski gets caught, the binding between the boot and the ski will release so the ski pops off rather than twisting your knee. Sometimes this leads to the

    asked by OIan on April 23, 2013
  43. Economics

    3. Starting from short-run equilibrium, the following occurs: Labor productivity rises, and individuals expect higher (future) incomes. What will be the effects on the price level, Real GDP, and the unemployment rate in the short run? a.Real GDP will fall,

    asked by Sarah on April 26, 2007
  44. Literature-Help me Ms. Sue

    13. Regarding the difference between fiction and nonfiction which statement is most accurate? A. Writers of nonfiction have no need to express passionate opinion B. Nonfiction writers are free to embellish the facts. C. Nonfiction writers are more often

    asked by Unmei on July 5, 2014
  45. literature

    Regarding the difference between fiction and nonfiction, which statement is most accurate? A. Nonfiction writers are more often free to move about in time and space. B. Literary fiction does little except inform and specify. C. Nonfiction writers are free

    asked by rich on August 5, 2009
  46. simple intrest

    My daughter brought home a work sheet and I have no clue where to begin to help her and she seems to have no clue either. the questions are 1. Find the final balance in each account. $800 at 4.25% simple intrest for 6 years 2. $2,000 at 6% compounded

    asked by Veronica on February 21, 2007
  47. Science

    A net force of 200n gives a body of mass m1 an acceleration of 80m/s2 and a body of mass m2, an acceleration of 240m/s2. The acceleration that this force causes when the masses combine together is -

    asked by SANJU on August 4, 2018
  48. Physics

    A ball is thrown as a projectile with a horizontal velocity of 30 m/s and a vertical velocity of 30 m/s. At the highest point which of the following is true? A) The velocity is zero B) The acceleration is 0 C) The acceleration is 9.8 m/s2 D) The

    asked by Anonymous on July 9, 2014
  49. physics

    The front 1.20 m of a 1,350-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 21.0 m/s stops uniformly in 1.20 m, how long does the collision last? s (b) What is the magnitude of the average

    asked by mark on March 4, 2016
  50. physics

    A car brakes at constant acceleration from a velocity 226m/s to 12.5m/s over a distance of 105m.find; a)How much time elapses during this time interval. b)what is the acceleration. c)if the car continued to be braked at same constant acceleration how much

    asked by claire on November 15, 2016
  51. Physics

    The front 1.20 m of a 1,350-kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 22.0 m/s stops uniformly in 1.20 m, how long does the collision last? s (b) What is the magnitude of the average

    asked by Allie on October 4, 2011
  52. Physics

    Liz rushes down onto a subway platform to find her train already departing. She stops and watches the cars go by. Each car is 8.60 m long. The first moves past her in 1.75 s and the second in 1.17 s. Find the constant acceleration of the train. I know how

    asked by Erin on October 11, 2009
  53. eco

    2. It has been estimated that the price elasticity of demand for attending baseball games is 0.23. Other things held constant, a 10 percent increase in attendance can be explained by a: A. 43.48 percent fall in the price of a ticket. B. 43.48 percent rise

    asked by tania on March 10, 2013
  54. Physics

    a) What is the tangential acceleration of a bug on the rim of a 6in. diameter disk if the disk moves from rest to an angular speed of 79 rev/min in 5 seconds? b) One second after the bug starts from rest, what is its tangential acceleration? What is its

    asked by Elizabeth on April 15, 2010
  55. Physics

    A car traveling at a velocity of 2m/s undergoes an acceleration of 4.5m/s2 over a distance of 340m.How fast will it be going after the acceleration?

    asked by Sean on October 30, 2015
  56. science

    Find the acceleration of a lift moving upwards with 2m/s acceleration, 20kg on the it & 1000N force

    asked by prathibha on June 27, 2016
  57. physics

    A car which is traveling at a velocity of 9.6 m/s undergoes an acceleration of 4.2 m/s2 over a distance of 450 m. How fast is it going after that acceleration?

    asked by Auqib Ihsan on July 31, 2014
  58. physics (Roller Coasters)

    a)maximum acceleration that the human body can be subjected to resasonably saftely b) what happens when the acceleration is larger than this

    asked by Jessica on November 10, 2007
  59. Physics

    Spark timer acceleration lab How do you determine the acceleration from the slope of your best fit line?

    asked by Kiki on October 17, 2014
  60. Physics

    a cars speedometer reads 20 m/s after acceleration from standing start, for 25s. what was the magnitude of acceleration?

    asked by Kydera Taft on April 11, 2013
  61. science

    which of the inner planets has an internal structure similar to earth' and has the hottest surface of any planet in our solar system

    asked by salih lewis on October 16, 2018
  62. Science

    What are the main goals and strategies of green intelligence. Are they market based approaches that could save the planet?

    asked by Tameika on October 10, 2011
  63. analogies

    skill is to prowess consternation;fear orbit;planet fire;smoke journey;destination

    asked by wesley on February 21, 2008
  64. phy111

    14 Given that the mass and radius of Jupiter are respectively 1 90 1027kg and 7 15 104km, calculate the escape velocity from the surface of the planet

    asked by hart on October 25, 2014
  65. science

    What is the gravitational potential energy of a 2kg ball on planet earth raised 15 meters in the air?

    asked by erik on January 23, 2013
  66. Science

    Which of the following planets is considered a rocky, or terristrial, planet? A. Venus B. Neptune C. Saturn D. Uranus Is the answer A? Thank you

    asked by Anonymous on March 13, 2015
  67. Biology/help please

    I am a being from another planet, please explain to me which is alive: a clock or a fish? Compare the two, similarities and differences.Can you help me answer this question ? thank you.

    asked by marie on November 5, 2010
  68. University Appeal Letter........HELP PLZ..

    I applied my first choice collegefor 2007 Fall admission. But they gave me summer admission finally, which I don't want to get. So I decide to write an appeal letter to the admission office asking for fall admission. The reason why I want them to

    asked by crzyadmi on April 13, 2007
  69. Physics Questions Help Please!

    1) The lowest tone to resonate in an open pipe of length L is 1600 Hz. What is the frequency of the lowest tone that will resonate in a closed pipe of length 2L? a) 100 Hz b) 1.60 Hz c) 200 Hz d) 0.800 kHz 2) Which of the following does not increase as a

    asked by Kimberly on December 6, 2014
  70. algebra 1

    In a basketball game you score 2 points for a field goal and 1 point for a free throw. Suppose that you have scored at least 5 points a game and have a season high of 12 points a game. How many field goals and free throws could you have made in one game?

    asked by ian on April 13, 2016
  71. Physics

    A boy whirls a stone in a horizontal circle of radius 1.2 m and at height 2.0 m above ground level. The string breaks, and the stone flies horizontally and strikes the ground after traveling a horizontal distance of 10 m. What is the magnitude of the

    asked by Troyyyy on February 3, 2007
  72. Physics

    1) what does the y intercept on a force vs acceleration graph represent? 2)what is the relationship of mass and acceleration?

    asked by Aly on October 30, 2013
  73. physics

    A 3.03 kg briefcase is sitting at rest on a level floor. The acceleration of gravity is 9.81 m/s 2 . a) What is its acceleration?

    asked by Anonymous on November 23, 2011
  74. Physics

    If you drop an object, its acceleration toward the ground is 10.0 m/s^2. If you throw it down instead, is its acceleration after throwing greater than 10.0 m/^2 ? Why or why not?

    asked by Anonymous on April 10, 2012
  75. physics

    a comet experiences a uniforn acceleration from 60m/s to 183m/s what is the rate of acceleration?

    asked by ricky on January 3, 2012
  76. PHYSICS

    Can a car move around a racetrack so that it has tangential acceleration byt no centripetal acceleration?

    asked by hailey on January 24, 2010
  77. physics

    A 3.00 kg book is dropped from a height of 2.2 m. The acceleration of gravity is 9.81 m/s2 . a) What is its acceleration? Answer in units of m/s2.

    asked by kayla on October 11, 2010
  78. Physics

    If you drop an object, its acceleration toward the ground is 10.0 m/s^2. If you throw it down instead, is its acceleration after throwing greater than 10.0 m/^2 ? Why or why not?

    asked by Anonymous on April 10, 2012
  79. physics

    n object is dropped from rest. What is the acceleration after 6 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m/

    asked by alyssa on October 21, 2013
  80. physics

    Is it possible for a car to move in a circular path in such a way that it has a tangential acceleration but no centripetal acceleration?

    asked by shawn on October 9, 2009
  81. Physics

    Automotive engineers refer to the time rate of change of acceleration as the "jerk." Assume an object moves in one dimension such that its jerk J is constant. (a) Determine expressions for its acceleration ax(t), velocity vx(t), and position x(t), given

    asked by Lorine on September 11, 2014
  82. English

    I really need to know if all the coorections are OK. It is really urgent. 1)The subject of the poem is the description of some soldiers while they are retreating through (toward) their trenches. 2)They should be young and strong but, because of their

    asked by Henry1 on May 2, 2011
  83. physics lab

    Consider different points along one spoke of a wheel rotating with constant angular velocity. Which of the following is true regarding the centripetal acceleration at a particular instant of time? A The magnitude of the centripetal acceleration is greater

    asked by Chris on February 16, 2011
  84. physics

    A box slides down a 33.3 ◦ ramp with an acceleration of 1.07 m/s 2 . The acceleration of gravity is 9.8 m/s 2 . Determine the coefficient of kinetic friction

    asked by Anonymous on December 4, 2012
  85. physics

    In thrill machine rides at amusement parks ,there can be an acceleration of 3g or more .But without head rests ,acceleration like this would not be safe.think why not?

    asked by aman on June 17, 2008
  86. physics

    How far from the center of the earth must a person be to experience acceleration due to gravity that is one half the acceleration at the surface?

    asked by Anonymous on February 19, 2012
  87. physics

    In thrill machine rides at amusement parks there can be an acceleration of 3g or more.But without head rests acceleration like this would not be safe. think why not?

    asked by swow on July 4, 2010
  88. Physics

    A motor cycle starts from rest and reaches a speed of 6m/s after travelling with uniform acceleration for 3s. What is his acceleration?

    asked by Jasmine on October 14, 2012
  89. science

    A truck travelling down the hill at constent acceleration. If it teavell 300m in 15s calculate it acceleration

    asked by akki on April 30, 2016
  90. physics

    A body travels with uniform acceleration.Its final velocity,v=180-7x,where x is the displacement.Then find its acceleration.

    asked by go ramesh on October 1, 2014
  91. Physics A level

    An object travelling at constant acceleration covers a distance of 14m in 3.0s and a further 26m in the next 3.0s. Calculate the acceleration

    asked by jiiiiiiiiii on October 5, 2017
  92. physics

    Moving with uniform acceleration a body covers 80 m in first 5s and 180m in next 5s.find initial velocity and acceleration

    asked by rushil on March 28, 2016
  93. science

    an empty truck with a mass of 3000 kg has a maximum acceleration of 1m/s2 .what will its acceleration be when it carries a load of 1000 kg?

    asked by maziya on September 27, 2014
  94. physics

    A sprinter explodes out of the starting block with an acceleration of + 2.29 m/s2, which she sustains for 1.13 s. Then, her acceleration drops to zero for the rest of the race.

    asked by Kendall on September 11, 2012
  95. Modern World History

    Help on this short essay The Purpose of this essay is to analyze the legacy of the Holocaust. Describe the events from the Nuremberg Laws of 1935 to when the camps were free why did the people of Germany go along with this? This site has Holocaust timeline

    asked by Bryan on March 20, 2007
  96. Physics

    An object starts from rest an under a constant acceleration has traveled a displacement of 30.5 meters when it reaches a certain final velocity. The same object starts from rest, but has an acceleration which is a factor of 3.3 times smaller than the

    asked by Sam on September 8, 2014
  97. English

    Can you please consider these sentences from a grammatical and lexical point of view? Thank you in advance. 1) Since the last years of the 19th century Europe started to live a very deep crisis. (Since the last years.... had been experienced?) 2) Freud

    asked by Franco on May 24, 2010
  98. Math

    Amy has $1,000 in a savings account at the beginning of the fall. She wants to have at least $500 in the account by the end of the fall. She withdraws $100 a week for living expenses. Write an inequality for the number of weeks Amy can withdraw money, and

    asked by Lexi on October 25, 2017
  99. modern physics

    a record player is switched from 33rpm to 45rpm.The artable changes speed in 2.0s.Calaculate its average angular acceleration and the average tangential acceleration of a point on the turnable that 15cm from the axis rotation. Why are you posting in

    asked by mich on November 14, 2006
  100. Physics Lab I

    Let's say you measure an average acceleration to be 0.4134 ms-2. What is the height (in centimeters) of the riser block? Assume the legs of the track span 1.0000 m and that there is neither friction nor drag. Also assume the block is under one of the legs.

    asked by Richard on November 4, 2010