1. grammar

    Which is the correct verbal usage of the following sentence? I let it there while I stood and applauded or I left it there while I stood and applauded?

    asked by Timothy on January 24, 2012
  2. Physics-Please help

    If I have a roller coaster, and hill 1 height is 50cm and hill height 2 is 25 cm and the PE is .9 as it approaches the top of hill 2, how do I calculate the speed. Please help

    asked by Joey on November 4, 2010
  3. psychology

    Because you are bored one afternoon, you decide to try a little experiment. You open your eye very wide, extend your thumb, and then poke yourself in the e ure. Aside from being very foolish and in alot of pain, you may learn something about your eye when

    asked by lily on March 14, 2016
  4. Customer Service

    1. Which of the following is strategies my best ensure a positive relationship with supervisor? A. Answering any criticism concerning your job performance with a strongly worded defense B. Gathering answers to any questions you may have regarding your

    asked by Shamie on September 25, 2013
  5. PHYSICS

    An astronomical telescope has an objective lens of 80cm and an eyepiece of 5cm focal length.If the final image is formed 25cm from the eye piece when a distant object is viewed by the eye close to the eyepiece,determine the magnifying power of the

    asked by ceasar1 on November 10, 2011
  6. physics hw

    A 300. kg roller coaster car is traveling at a constant speed of 15 m/s over a hill with a radius of curvature of 30. m. b. What is the normal force acting on the car at the top of the hill? c. Assume that the car is at the intersection of the radius and

    asked by robert on May 2, 2011
  7. Science

    A white eyed male Drosophila is crossed to a red eyed female all the resulting progeny have red eyes. A. This shows that eye colour is sex linked. B. This shows that eyes are recessive to white eyes. C. Both of the above. D. None of the above I think it is

    asked by Kathy on January 29, 2017
  8. science

    two cyclists are riding their bikes up a steep hill. hessica rides her bike straight up the hill. adrian rides his bike up the hill in a zigzag path. adrian and jessica have identical masses. once they reach the top of the hill, does adrian have less

    asked by Taylor on January 7, 2013
  9. math

    Coming down the long hill,Nelson averaged 24 miles per hour. If it took him 5 minutes to come down the hill, how long was the hill? Please help

    asked by Anonymous on October 1, 2010
  10. science

    what is the probability that if each parent has one brown eye gene and one blue eye gene will have one chance in four that there children will get two blue eye genes?please help.

    asked by abibirty on July 14, 2015
  11. Math

    9.)Which hill described in the table is the steepest? Explain.' (Table) Street Horizontal Distance (ft) Vertical Rise Dixie Hill 60 20 Bell Hill 60 40 Liberty Hill 60 30 A.)Bel Hill; it rises 2/3 ft for every 1 food of horizontal travel. B.)Dixie Hill; it

    asked by #FreeGucci on April 13, 2016
  12. englisch

    ich muss ein referat auf englisch machen. ich paar fragen: different knd of animal,where it lives,what it eats,whenit sleeps,what it does,what is special about it,pictures,where it sleeps. bitte schreibt mir die internet seite? NICHT vergessen es muss auf

    asked by priyanka on December 24, 2013
  13. retina

    Why can a blow to the front of the eye result in damage to the retina of the eye? See http://www.aafp.org/afp/20040401/1691.html for an explanation in medical terms. The entire eye is affected by the pressure wave resulting from the trauma of impact at the

    asked by Lisa on June 17, 2006
  14. Biology Please help

    There are several genes that control eye color; eye color is therefore called a (A) Polygenic trait. Besides genes that directly control eye color, there are other genes that can affect the color of your eyes. For example, your eye color genes may code for

    asked by Ann on May 24, 2014
  15. Physics

    A 5.6 kg ball (I=2/3mr^2) starts on a hill 11.3 m above level surface of the ground. The ball then rolls (without slipping) down the hill. What is the linear speed of the ball when it reaches the bottom of the hill?

    asked by Sarah on March 18, 2015
  16. Physics

    Could someone please explain how you get this answer??? A skier with a mass of 60.0 kg pushes off with a horizontal speed of 3.0 m/s from the top of a snow covered hill. As he slides down the hill, his height decreases by 42 m over a distance of 100 m of

    asked by Demere on March 2, 2013
  17. Physical science

    A ball rolls down a hill which has a vertical height of 15m .ignoring friction, what would be the (A)gravitation potential energy of the ball when it is at the top of the hill? (B)velocity of the ball when it reaches the bottom of the hill?

    asked by Lesedi on October 15, 2016
  18. Physics-1

    A child sleds down a snow covered hill with a uniform acceleration. The slope of the hill is 38.5 m long. If the child starts at rest and reaches the bottom of the hill in 5.5 s, what is the child's final speed?

    asked by NoNo100 on September 17, 2009
  19. PHUSICS

    An old English nursery rhyme starts off "Jack and Jill went up the hill to fetch a pail of water". If the hill is 10 m high and Jack weighs 700 N, how much work in Joules did Jack need to do to get to the top of the hill?

    asked by Anonymous.....ANYONE....PLEASE HELP... on March 12, 2013
  20. Physics

    A kid slides down an icy (frictionless) hill starting from res. At the top his gravitational potential energy is 500J. Suppose after reaching the bottom he then continues sliding up another icy slope on the other side of the valley. Whenhe finally comes to

    asked by Tarissa on July 30, 2011
  21. Physics

    A child insists on going sledding on a barely snow-covered hill. The child starts from rest at the top of the 60 m long hill which is inclined at an angle of 30o to the horizontal, and arrives at the bottom 8.0 s later. What is the coefficient of kinetic

    asked by Mary on February 12, 2012
  22. Physics

    A 2.0 x 103 kg car is pulled 345 m up a hill that make s an angle of 15° with the horizontal. What is the potential energy of the car at the top of the hill? If the car rolls down the hill, what will its speed be if we neglect friction? plz help? confused

    asked by James on January 17, 2008
  23. Physics

    A 2.0 x 103 kg car is pulled 345 m up a hill that make s an angle of 15° with the horizontal. What is the potential energy of the car at the top of the hill? If the car rolls down the hill, what will its speed be if we neglect friction? plz help? confused

    asked by James on January 17, 2008
  24. Physics

    A 2.0 x 103 kg car is pulled 345 m up a hill that make s an angle of 15° with the horizontal. What is the potential energy of the car at the top of the hill? If the car rolls down the hill, what will its speed be if we neglect friction? plz help? confused

    asked by James on January 17, 2008
  25. Art

    What is the symbolism behind the eye at the top of the pyramid on a United States dollar, and what does this image say about America's national identity? A. The eye represent God's clarity and America's identity as a nation protected by God. B. The eye

    asked by CanYouHelpMe on March 14, 2017
  26. physics

    a truck with a mass of 1,500 kg is parked on a hill with a slope of 7 degrees. the parking break is released and the truck starts to roll down the hill. a) assuming friction is negligible what will by the force that moves the car down the hill? b) what

    asked by ken on February 2, 2012
  27. physics

    a truck with a mass of 1,500 kg is parked on a hill with a slope of 7 degrees. the parking break is released and the truck starts to roll down the hill. a) assuming friction is negligible what will by the force that moves the car down the hill? b) what

    asked by ken on February 2, 2012
  28. Math: Algebra

    Landon can climb a certain hill at a rate that is 2.5 mph slower than his rate coming down the hill. If it takes him 6 hours to climb the hill and 45 minutes to come down the hill, what is his rate coming down?

    asked by Matt on February 1, 2012
  29. algebra

    Landon can climb a certain hill at a rate that is 3.5 mph slower than his rate coming down the hill. If it take him 4 hours to climb the hill and 135 minutes to come down the hill. what is his rate coming down.

    asked by tierra on October 8, 2014
  30. Art

    what is the symbol behind the eye on top of the pyramid on the united state dollar and what does this image say about the american national identity? A. The eye represent god's clarity and America's identity as a nation protect by God.•• B. The eye

    asked by Tj on February 26, 2016
  31. Physics

    A bicyclist on an old bike (combined mass: 96 kg) is rolling down (no pedaling or braking) a hill of height 103 m. Over the course of the 278 meters of downhill road, she encounters a constant friction force of 323 Newton. If her speed at the top of the

    asked by Layla on October 31, 2010
  32. physics

    A skier slides down a hill starting with zero velocity at a height of h1 = 45.2 m above the bottom of the hill. The shape of the terrain is like a cosine wave. a) What is the velocity of the skier on top of the second, intermediate hill, whose height is h2

    asked by ATT on March 30, 2018
  33. art

    what is the symbolism behind the eye at the top of the pyramid on a United States dollar , and what does this image say about America's national identity? A. the eye represents God's clarity and America's identity as a nation protected by God B. The eye

    asked by emma :)) on March 3, 2016
  34. physics

    A 40.0 kg wagon is towed up a hill inclined at 17.9° with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 140 N. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. How fast is

    asked by luc on October 10, 2009
  35. Physics

    a skier, mass 61 kg is at the top of a hill and starts down with an initial speed of 5m/s. he does no work on the way down, assume that the hill surface is frictionless. find his speed at the bottom of the hill which is 10m below the top.

    asked by S on February 25, 2016
  36. physics

    Does the momentum from the arms transfer to the body if you stop it when jumping? so if you jump vertically and you swing your arms forward to give them an angular momentum and then your arms reaches it's limit. does the angular momentum transfer to the

    asked by Anonymous on May 14, 2017
  37. calculus

    1. A hill with a 35 degree grade (incline with horizontal) is cut down for a roadbed to a 10 degree grade. If the distance from the base to the top of the original hill is 800 ft., How many vertical ft will be removed from the hill rounded to the nearest

    asked by Nolan on April 30, 2012
  38. probability

    Mendel found that flower color in certain pea plants obeyed the following scheme. Pure red crossed with pure white produces red. When pure red​ (RR) and pure white​ (rr) parents are​ crossed, the resulting Rr combination​ (one of each​ gene)

    asked by karisma on August 9, 2016
  39. Math

    The base of a hill is -30 feet below sea level .,The top of the hill is 200 feet higher .What is the elevation of the top of the hill . Plz show me how to get the answer its confusing

    asked by Rian on September 1, 2014
  40. physics

    You are planning to build a log cabin in northern Minnesota. You will pull the logs up a long, smooth hill to the building site by means of a rope attached to a winch. You need to buy a rope for this purpose, so you need to know how strong the rope must

    asked by nate on September 27, 2012
  41. physics

    Some sliding rocks approach the base of a hill with a speed of 18.0 . The hill rises at 41.0 above the horizontal and has coefficients of kinetic and static friction of 0.420 and 0.570, respectively, with these rocks. Start each part of your solution to

    asked by Anonymous on October 3, 2012
  42. Physics

    You are at the park. You are going to analyze a roller coaster. You ask the attendant for the height of the first hill and find out that it is 106.1 feet tall. Along with your group members, you pace off a train waiting to be loaded. The train is 10.5

    asked by Help! on December 19, 2012
  43. math

    Days on Planet Red are 13 hours long. The animals on Planet Red have regular eating and sleeping habits. The silver snake sleeps for 150 hours, eats for 6 hours, then goes back to sleep. The green walking fish sleeps for 364 hours, eats for 26 hours and

    asked by david on February 7, 2008
  44. Physics

    A flat 100kg rock slides down a smooth rocky hill. It started from rest. The hill is 100m long and 50m high. The friction force between the rock and the ground is 150N. Use g=10m/s². Calculate the speed of the rock at the bottom of the hill

    asked by physics on October 30, 2018
  45. math

    Street | Horizontal | Vertical rise Distance ft. |of street ft. _______|_____________|_______________ Dixie hill| 80. | 40 Bell hill | 80. | 20 Liberty hill| 80. | 60 Which hill is the steepest? Explain. A. Bell hill; it rises one foot for for every 4 feet

    asked by sad with math on April 27, 2015
  46. Physics-Please help explain

    What happens to a rollercoaster's motion in terms of energy when it goes over a second hill that is higher than the first hill.I think it is because the kinetic energy does not have the momentum so when converted into PE, it can't make it over a higher

    asked by Ashley on November 4, 2010
  47. Physics

    A 10 kg bowling ball sits at the top of a 10 m hill and then slides down its icy hillside. a. What is the speed of the bowling ball when it reaches the bottom of the hill? b. What is the change in kinetic energy of the system as the bowling ball travels

    asked by Khalil on February 26, 2018
  48. Physics

    A cyclist approaches the bottom of a gradual hill at a speed of 20 m/s. The hill is 4.4 m high, and the cyclist estimates that she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which

    asked by Zach on February 26, 2008
  49. Physics

    A 79.5 kg snowboarder heads down a 28.0° hill that has a height of 62.8 m. If the hill is assumed to be frictionless and there is horizontal wind with a force of 98 N acting against the snowboarder, find the speed of the snowboarder as they reach the

    asked by Anonymous on November 23, 2015
  50. ENGLISH

    The phrase "my eye caught the shadow means" : A. I saw the shadow out of the corner B. My eye went and grabbed hold of a shadow C. The shadow grabbed my eye D. I saw a man standing at my side

    asked by CHRIS on June 25, 2012
  51. Art help please

    French artist daguerre invented the camera using which creative sensibilities that were developed during his painting and set design career? A. an eye for line and form B. an eye for patterns and design C. an eye for color placement and color mixing D.an

    asked by anonymous on March 31, 2015
  52. Art

    French artist daguerre invented the camera using which creative sensibilities that were developed during his painting and set design career? A. an eye for line and form B. an eye for patterns and design C. an eye for color placement and color mixing D.an

    asked by anonymous on March 31, 2015
  53. Physics

    A toboggan, with rider, has a combined mass of 60kg at the top of a 5.0m hill. They are given an initial push of 2.0m/s. The distance down the hill was 20m. The velocity at the bottom of the hill is 10m/s. If the actual speed at the bottom was 9m/s, what

    asked by Mike on January 23, 2018
  54. physics

    A 5.0 ball is initially sitting at rest on top of a 41 m high hill. The ball is pushed with a force of 25 N for 3.0 s toward the edge of a hill. Upon reaching the edge, the ball is allowed to roll down the hill where it reaches the flat ground. To the

    asked by maddy on May 30, 2013
  55. physics

    A sled rider with a combined mass of 50.0kg are at the top of a hill of a 14m above the level of ground below. The sled is given a push providing an initial kinetic energy of 1700J. What is the potential energy at the top of the hill? After the push, what

    asked by Mary on February 25, 2013
  56. Math

    The coordinates of the top of a hill are (2, 14). The coordinates of the bottom of the hill are (10, 2). Given this information, what is the slope of the hill?

    asked by Amanda on July 15, 2015
  57. physics

    A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard

    asked by Corey on December 5, 2010
  58. physics

    A 38.2 kg wagon is towed up a hill inclined at 19° with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 140 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard

    asked by Corey on December 5, 2010
  59. PHYSICS

    Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #1: A skier with a mass of 60.0 kg is standing at the top

    asked by Anna on March 7, 2013
  60. History

    Read the excerpt from Hammurabi’s Code. “If a man has knocked out the eye of a patrician [aristocrat], his eye shall be knocked out. . . If he has knocked out the eye of a plebeian [commoner] . . . he shall pay one mina of silver. If he has knocked out

    asked by INEEDHELP on November 15, 2018
  61. Science

    How does DNA determine a trait that determines eye color? 1)DNA codes for proteins that determine eye color. 2)DNA codes for mRSA that determines eye color. 3)DNA interacts with proteins to control eye color. 4) DNA contains pigments which make up eye

    asked by Jamie on February 2, 2018
  62. math

    A hill is inclined at 18 degrees to the horizontal. If the base of the hill is at sea level, find my height above sea level if i walk 1.2 km up the hill

    asked by james on January 26, 2010
  63. Physics

    A 40.7kg wagon is towed up a hill inclined at 18.1 degrees with respect to the horizontal. The tow rope is parallel to the incline and has a tension of 139N in it. Assume that the wagon starts from rest at the bottom of the hill, and neglect friction. The

    asked by Ethan on February 15, 2012
  64. phys1

    A 528 kg automobile is moving at 20.4 m/s at a height of 5.0 m above the bottom of a hill when it runs out of gasoline. The car coasts down the hill and then continues coasting up the other side until it comes to rest. Ignoring frictional forces and air

    asked by opp on February 27, 2012
  65. Biomechanics

    A volleyball is bumped vertically up to a height of 10 m above the player’s arms. What was the initial velocity of the ball just after leaving the player’s arms?

    asked by anonymous on August 3, 2016
  66. Physics

    A 5 kg ball is initially at rest at the top of a hill 10m high. If it rolls down the hill (converting all of its potential energy to kinetic energy,) what is the maximum kinetic energy it could have at the bottom of the hill? -I am not sure what formula to

    asked by Jordan on June 29, 2011
  67. physics

    A cyclist approaches the bottom of a gradual hill at a speed of 12.4 m/s. The hill is 6.7 m high and the cyclist estimates she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which the

    asked by Anonymous on November 16, 2012
  68. Physics

    A cyclist approaches the bottom of a gradual hill at a speed of 20 m/s. The hill is 4.4 m high, and the cyclist estimates that she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which

    asked by Zach on February 25, 2008
  69. Physics

    A cyclist approaches the bottom of a gradual hill at a speed of 14 m/s. The hill is 4.0 m high, and the cyclist estimates that she is going fast enough to coast up and over it without peddling. Ignoring air resistance and friction, find the speed at which

    asked by Peter on February 25, 2008
  70. Statistics (37)

    According to the Sleep Foundation, the average night's sleep is 6.8 hours (Fortune, March 20, 2006). Assume the standard deviation is .7 hours and that the probability distribution is normal. a. What is the probability that a randomly selected person

    asked by Mia on May 6, 2014
  71. Economics (37)

    According to the Sleep Foundation, the average night's sleep is 6.8 hours (Fortune, March 20, 2006). Assume the standard deviation is .7 hours and that the probability distribution is normal. a. What is the probability that a randomly selected person

    asked by Mia on May 10, 2014
  72. SS Help!

    The 2nd amendment is "the right of the people to keep and use bear arms". what does Right to keep and bear arms means??? (please tell in a 7th grade level)

    asked by Laruen on April 10, 2012
  73. Physics

    A)A 100kg person is riding a 10kg bicycle up a 25degree hill. The hill is long and the coefficient of static friction is 0.9. How much force does the person have to apply in order for her to ride 10m up the hill at constant velocity? B) If the person now

    asked by Alex on November 3, 2016
  74. Physics

    A figure skater is spinning at a rate of 1.1 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 66% of its original value. What is her new rate of rotation?

    asked by Katie on October 26, 2014
  75. physic

    A figure skater is spinning at a rate of 1.7 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 64% of its original value. What is her new rate of rotation?

    asked by femi on November 10, 2014
  76. physics

    A figure skater is spinning at a rate of 1.7 rev/s with her arms outstretched. She then draws her arms in to her chest, reducing her rotational inertia to 62% of its original value. What is her new rate of rotation?

    asked by stephanie on December 4, 2007
  77. physics

    A 1400kg car starts at rest and rolls down a hill from a height of 12m. (a) how much kinetic energy does the car have at the bottom of the hill?(b) how fast is the car going at the bottom of the hill? Can someone explain how to do it!

    asked by kiki on December 1, 2011
  78. physics

    An ice skater has a moment of inertia of 2.3 kg * m^2 when his arms are outstretched and a moment of inertia of 1.0 kg * m^2 when his arms are tucked in close to his chest. If he starts to spin at an angular speed of 2.0 rps (revolutions per second) with

    asked by Dorian on April 12, 2011
  79. precalculus

    Berry is standing at the edge of a hill that slopes downward and to the right. He notices that for every 5 feet you go in a horizontal direction, the hill drops by 2 feet. Berry places a ball at the edge of the hill (the origin of the coordinate system),

    asked by Anonymous on June 10, 2013
  80. Biology genetics

    A geneticist crossed two corn plants, creating a heterozygous decahybrid (ten traits). This decahybrid was then self-fertilized. How many different kinds of gametes were produced? What portion of the offspring were homozygous recessive? How many different

    asked by Happy on January 6, 2018
  81. Literature

    "Slowly, silently, now the moon Walks the night in her silver shoon This way, and that, she peers, and sees Silver fruit upon silver trees; One by one the casements catch Her beams beneath the silvery thatch; Couched in his kennel, like a log, With paws of

    asked by Anonymous on April 8, 2013
  82. science

    a turtle has a mass of 10 kilograms and is traveling 5 m/s down a hill. the hill has a height of 35 meters. what is the kinetic energy of the turtle traveling down hill?

    asked by yasmine on January 11, 2012
  83. Bio

    In Drosophila, sepia colored eyes are due to a recessive allele s and wild type (red eye color) to its dominant allele s+. Sepia-eyed females are crossed to pure wild type males. What phenotypic and genotypic ratios are expected if the F1 males are then

    asked by Amber on February 13, 2013
  84. Physics

    Buffy the Vampire Slayer is buffing up her 0.53 meter long arms by bench pressing. In 35 seconds she can lift 38 kilograms of mass 23 times. How powerful are Buffy's arms?

    asked by Anonymous on March 10, 2013
  85. Physics

    Buffy the Vampire Slayer is buffing up her 0.53 meter long arms by bench pressing. In 35 seconds she can lift 38 kilograms of mass 23 times. How powerful are Buffy's arms?

    asked by Anonymous on March 10, 2013
  86. physics/Math

    Buffy the Vampire Slayer is buffing up her 0.53 meter long arms by bench pressing. In 31 seconds she can lift 39 kilograms of mass 22 times. How powerful are Buffy's arms?

    asked by Anonymous on February 3, 2015
  87. math

    A choir is singing at a festival. On the first night 12 choir members were absent,so the choir stood in 5 equal rows. On the second night only one member was absent, so they stood in 6 equal rows. the same number of people stood in each row each night. How

    asked by jill on January 15, 2014
  88. Physics

    Two 30kg children in a 20 kg cart are stationary at the top of a hill. They start rolling down the 80m tall hill and they are traveling at 30 km h-1 when they reach the bottom. (The cart had brakes!) How much work was done on the cart by friction during

    asked by Ellie on September 22, 2012
  89. physics

    A 35.2 kg wagon is towed up a hill inclined at 18.3◦ with respect to the horizontal. The tow rope is parallel to the incline and exerts a force of 125 N on the wagon. Assume that the wagon starts from rest at the bottom of the hill, and disregard

    asked by Anonymous on October 27, 2014
  90. Physics help

    A 75.0 kg novice skier is going down a hill with several secondary hills. Ignore frictional effects and assume the skier does not push off or slow himself down. If the initial hill is 38.7 m above the chalet level: (8 marks) a) What is the speed of the

    asked by silverback on January 13, 2016
  91. Physics

    A child riding a bicycle has a total mass of 40kg. The child approaches the top of a hill that is 10m high and 100m long at 5m/s. If the force of friction between the bicycle and the hill is 20N, what is the child's velocity at the bottom of the hill?

    asked by Monique on November 16, 2009
  92. math

    Fireworks are to be launched from a platform at the base of a hill. Using the top of the platform as the origin and taking some measurements, it was determined that the cross-section of the slope of one side of the hill is y=4x-12 If the path of the

    asked by Alex on January 22, 2015
  93. math

    Fireworks are to be launched from a platform at the base of a hill. Using the top of the platform as the origin and taking some measurements, it was determined that the cross-section of the slope of one side of the hill is y=4x-12 If the path of the

    asked by Alex on January 26, 2015
  94. math

    Fireworks are to be launched from a platform at the base of a hill. Using the top of the platform as the origin and taking some measurements, it was determined that the cross-section of the slope of one side of the hill is y=4x-12 If the path of the

    asked by Alex on January 26, 2015
  95. physic

    A roller-coaster car has a mass of 500 kg when fully loaded with passengers. The car passes over a hill of radius 15 m, as shown. At the top of the hill, the car has a speed of 8 m/s. What is the force of the track on the car at the top of the hill?

    asked by yusra on April 18, 2010
  96. Science

    A truck of mass 1200kg is parked at the top of a hill, 150m high. The truck driver lets the truck run freely down the hill to the bottom. A) What is the maximum velocity that the truck can achieve at the bottom of the hill?

    asked by Avu'o Raksiwah on November 4, 2018
  97. physics

    A ball rolls along flat ground at 7.0 m/s then encounters a hill. If the ball rolls 15 m up the hill before coming to a stop, what was the acceleration (in m/s2) experienced by the ball as it rolled up the hill?

    asked by dominique on September 13, 2013
  98. physics

    a 75.0 kilogram skier is at the top of a hill that is thirty degrees above the horizontal. the skier starts form and then travels down the hill which is 100 meters long. the skier at the bottom of the hill instantaneously then travels on flat horizontal

    asked by marie on November 15, 2010
  99. Chemistry

    Estimate how many microwave photons with 1=12 cm must be absorbed to raise the temperature of your eye by 3 degree C. Assume the mass of an eye is 11 g and its specific heat capacity is 4.0 J/g/k

    asked by Sarah on May 7, 2013
  100. physics

    Assume the height of a hill is 50m, calculate: a.the velocity of a car at the bottom ofg the hill b.the height at which it will have half the speed. Assume the car starts from rest at the top of the hill.

    asked by bola on February 23, 2010

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