1. Physics

    A boy on a 2.2kg skateboard initially at rest tosses a 7.9kg jug of water in the forward direction. If the jug has a speed of 3.2m/s relative to the ground and the boy and skateboard move in the opposite direction at .56m/s, find the boy's mass. Answer in

    asked by Fg on April 1, 2011
  2. PHYSICS

    The magnetic field of the Earth at a certain location is directed vertically downward and has a magnitude of 54.0 µT. A proton is moving horizontally towards the west in this field with a speed of 6.00 ✕ 106 m/s. (a) What is the direction and magnitude

    asked by Kathy on October 29, 2013
  3. its physics.. i just want the formula

    A boy on a 2.2 kg skateboard initially at rest tosses a(n) 7.7 kg jug of water in the forward direction. If the jug has a speed of 2.9 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.57 m/s, find the boy’s mass.

    asked by Rah_rAh on January 17, 2013
  4. phy101

    Calculate the velocity needed for an object starting at the Earth's surface to just barely reach a satellite in a geosynchronous orbit. Ignore air drag and assume the object has a speed of zero when it reaches the satellite. (The orbital radius of a

    asked by lee on September 26, 2012
  5. physics

    experiencing a constant horizontal 1.10 m/s wind, a hot air balloon ascends from the launch site at a constant vertical speed of 2.70 m/s. at a height of 202 m, the balloonist maintains constant altitude for 10.3 s before releasing a small sandbag. how far

    asked by jerry on December 8, 2016
  6. Calculus-Math

    The speed S of blood that is r centimeters from the center of an artery is given below, where C is a constant, R is the radius of the artery, and S is measured in centimeters per second. Suppose a drug is administered and the artery begins to dilate at a

    asked by Lorine on August 9, 2014
  7. physics

    Q: AN OBJECT IS MOVING PAST YOU IN A STRAIGHT LINE WITH A CONSTANT SPEED. YOU CAN CONCUDED A. THAT THERE IS A CONSTANT FORCE IN THE DIRECTION OF MOTION B. THAT THERE ARE NO FORCES ACTING ON THE OBJECT C. THAT THE NET FORCE ON THE OBJECT IS ZERO D. NONE OF

    asked by JACOB on April 23, 2012
  8. Physics Electricity

    Two identical point charges (q = 7.20 x 10^6 C) are fixed at diagonally opposite corners of a square with sides of length 0.480 m. A test charge (q0 = 2.40 x 10^8 C), with a mass of 6.60  108 kg, is released from rest at one of the empty corners

    asked by Frustrated on February 1, 2013
  9. physics

    King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 54 m/s and at an angle of 34°. A cannonball that was accidentally dropped hits the moat below in 1.1 s.(a) (a)How far from the castle wall does the

    asked by kate on June 19, 2011
  10. Physics

    A stone with mass 0.8kg is attached to one end of a string 0.9m long . The string will break if its tension exceeds 600N. The stone is whirled in a horizontal circle ,the other end of the string remains fixed. Find the maximum speed , the stone can attain

    asked by Swagat khanal on February 6, 2017
  11. Physics

    A smooth plane AB is 10 meters long, It is inclined at 30 degrees to the horizontal with the lower end, B, 6 meteres vertically above horixontal ground. A particle is placed on the plane at the upper end, A, and then released from erst so that it slides

    asked by Chris on February 4, 2012
  12. physics

    A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by Anonymous on November 15, 2012
  13. physics

    A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by Anonymous on November 15, 2012
  14. science

    A solid sphere of radius r is gently placed on rough horizontal ground with an initial angular speed and no linear velocity if the coefficient of friction is find the time when the slipping stops in addition state the linear velocity and angular velocity

    asked by Prashant Sartale on May 3, 2013
  15. physics

    A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by Anonymous on November 15, 2012
  16. physics

    A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration of gravity is 980

    asked by Anonymous on November 15, 2012
  17. PHYSICS

    A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 8.31 104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest insect

    asked by Ame on November 30, 2012
  18. PHYSICS

    Q: AN OBJECT IS MOVING PAST YOU IN A STRAIGHT LINE WITH A CONSTANT SPEED. YOU CAN CONCUDED A. THAT THERE IS A CONSTANT FORCE IN THE DIRECTION OF MOTION B. THAT THERE ARE NO FORCES ACTING ON THE OBJECT C. THAT THE NET FORCE ON THE OBJECT IS ZERO D. NONE OF

    asked by JACOB on April 22, 2012
  19. 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

    asked by Mel on November 27, 2012
  20. phsics

    A coin with a diameter of 1.9 cm is dropped on edge onto a horizontal surface. The coin starts out with an initial angular speed of 19 rad/s and rolls in a straight line without slipping. The rotation slows with an angular acceleration of magnitude 2.1

    asked by help on September 27, 2010
  21. physics

    King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 42 m/s and at an angle of 33°. A cannonball that was accidentally dropped hits the moat below in 1.6 s. (a) How far from the castle wall does the

    asked by Haley on March 5, 2012
  22. Physics

    A 1260-kg car starts from rest at the bottom of a drive way and has a speed of 3.00 m/s at a point where the drive way has risen a vertical height of 0.600 m. Friction and the drive force produced by the engine are the only two nonconservative forces

    asked by Cheech on October 3, 2013
  23. Physics

    A bag of blood with a density of 1050 kg/m3 is raised 1.37 m higher than the level of a patient’s arm. How much greater is the blood pressure at the patient’s arm than it would be if the bag were at the same height as the arm? Assume there is no change

    asked by Tim on February 28, 2012
  24. math

    1. Which situation is not a function? a) the number of days d below freezing each month b) the total cost of an item that costs x dollars with 7% sales tax c) the number of miles driven at a constant speed of 45 miles per hour after x hours d) the total

    asked by Hayley on April 15, 2012
  25. 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

    asked by PCm on April 24, 2013
  26. Pre-Ap Physics

    During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.65 km/s at an initial inclination of 41.9◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . How far away did the

    asked by Maria on September 24, 2012
  27. physics

    Two cars are travelling at adjacent highway lanes in the same direction . Car B is stopped by car A which travels at 15km/hr. Then 2 seconds later car B starts and accelerate at a constant rate of 3 meter per seconds square . Determine when and where car B

    asked by ekuase on April 20, 2017
  28. CALCULUS

    A plane, flying horizontally at an altitude of 1 km and a speed of 500 km/hr, passes directly over a radar station. find the rate in km/hr at which the distance from the plane to the station is changing when it is 2 km away from the radar station. Hint:

    asked by TANYA on April 24, 2014
  29. physics

    an electron with a speed of 5.00 x 10^8 cm/s enters an electric field of magnitude 1.00 x 10^3 N/C, traveling along field lines in the direction that retards its motion. a) How far will the electron travel in the field before stopping momentarily b) how

    asked by Anonymous on June 8, 2013
  30. physics

    2. A child throws his yoyo horizontally about his head rather than using it properly. The yoyo has a mass of 0.200 kg and is attached to a string 0.800 meters long. a. If the yoyo makes a complete revolution each second, what tension must exist in the

    asked by sam on May 1, 2011
  31. phys

    a spaceship travels with a speed of 0.7c as it passes by the Earth on its way to a distant star. The pilot of the spaceship measures the length of the moving ship as 50m. Determine its length as measured by a person on Earth. Answer in units of m. for this

    asked by slien on October 12, 2006
  32. science

    A ball hit by a player too 2.4s to reach the short stop from home plate. If the short stop threw the ball to first base at a speed of 20m/s, a distance of 30m, how long would the runner have to make it to first base and arrive at the same time as the ball.

    asked by amy on June 9, 2012
  33. Physics (Energy and Momentum)

    A block of mass m1 = 1.00 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 = 6.00 kg moving at 8.00 m/s. A massless spring with a spring constant k = 1320 N/m is

    asked by Andrew on April 17, 2012
  34. Physical Science

    The air temperature on a certain day is 86 degrees F A)Convert to Celsius? B) Calculate the sound of speed in air? C)When a 653Hz tornado siren is turned on, the sound takes 2.3s to reach an observer. How far is the observer from the main siren, and what

    asked by Charles on March 2, 2014
  35. phys

    a spaceship travels with a speed of 0.7c as it passes by the Earth on its way to a distant star. The pilot of the spaceship measures the length of the moving ship as 50m. Determine its length as measured by a person on Earth. Answer in units of m. for this

    asked by slien on October 10, 2006
  36. physics-distance

    Here's a stationary bike. If you pedal such that the front wheel rotates at 6.9 rad/s, and that wheel's radius is half a meter, how far would you have gone in 35 minutes, if the bike where a non-stationary bike? (Assume a constant speed of rotation) I am

    asked by Chris on November 4, 2014
  37. Physics

    A coin is placed 26 CM from the center of a horizontal turnable intially at rest. The turnable begin to ratate. When the speed of coin is 120 CMS rotating at constant rate the coin just begin to slip the acceleration of gravity is 980 CM/S2. What is the

    asked by Ravi on October 31, 2018
  38. Calculus

    An airplane flys at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of sight increasing when

    asked by Hailey on October 7, 2014
  39. Math

    An airplane flys at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of sight increasing when

    asked by John on November 12, 2015
  40. Calculusss heeelp plzzz

    A rocket is being tracked from a radar post that is 10 km from the launch pad.the rocket arises vertically at a height of 17.32 km and then turns at an angle of 30 degrees fron the vertical directly away from the radar post .it then travels  at the

    asked by Rahat on March 21, 2011
  41. Math

    An airplane flys at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of sight increasing when

    asked by Ashley on October 7, 2014
  42. Physics

    The ultrasonic transducer used in medical ultrasound imaging device is a very thin disk m = .10g driven back and forth in SHM at 1.0 MHz by an electromagnetic coil. a.) The maximum restoring force is 40,000 N. What is the maximum oscillation amplitude that

    asked by Kara on July 7, 2010
  43. Math

    A spherical vessel used for deep-sea exploration has a radius of 1.50 m and a mass of 1.20 × 104 kg. To dive, the vessel takes on mass in the form of seawater. Determine the mass the vessel must take on if it is to descend at a constant speed of 1.20 m/s,

    asked by Diaco on September 17, 2015
  44. physics help please!!**

    A typical GPS (Global Positioning System) satellite orbits at an altitude of 4.0 107 m. (Astronomical data needed for this problem can be found on the inside back cover of the text.) (a) Find the orbital period of such a satellite. hours (b) Find the

    asked by kelsey on October 30, 2008
  45. General physics

    A 34.1 kg child rides a Ferris wheel whose diameter is 18.3 m. When the ride is turning at a constant rate, the child’s speed has a constant value of 4.23 m/s. Find the normal force the seat exerts on the child at: a) The top of the ride b) The bottom of

    asked by ODU on July 2, 2013
  46. Physics

    A car's bumper is designed to withstand a 6.84-km/h (1.9-m/s) collision with an immovable object without damage to the body of the car. The bumper cushions the shock by absorbing the force over a distance. Calculate the magnitude of the average force on a

    asked by Karina on July 9, 2015
  47. physics

    A 0.0309-kilogram ball is stuffed into a spring gun and shot up into the air at some angle. The gun's spring has a force constant of 92.5 N/m and is initially compressed 0.138 m. When the ball reaches maximum height, it has a horizontal velocity with a

    asked by Physics on November 11, 2013
  48. calculus

    An airplane flys at a constant altitude of 2 miles and a constant speed of 600 miles per hour on a straight course that will take it directly over a kangaroo on the ground. How fast is the angle of elevation of the kangaroo's line of sight increasing when

    asked by Hailey on October 7, 2014
  49. Chemistry Inorganic

    What rationale is there for the mixing of sulfuric acid aqueous and water being exothermic but the mixing of solid ammonium chloride with water to be endothermic? Solid NH4CL dissociates in water, and the dissociation process requires some energy, because

    asked by Vic on July 31, 2007
  50. physics

    A box having a mass of 50kg is dragged across a horizontal floor by means of a rope tied on the front of it. The coefficient of friction between the box and the floor is .3. If the angle between the rope and the floor is 30 degrees, what force must be

    asked by Elise on January 11, 2011
  51. phsyics

    A box have a mass of 50 Kilograms is dragged across a horizontal floor by means of a rope tied on the front of it. The coefficient of friction between the box and the floor is .3. If the angle between the rope and the floor is 30 degrees, what force must

    asked by Anonymous on November 25, 2012
  52. physics

    A small ball with a mass of 0.05 kg moves along a circular orbit with a radius of 0.9 m at a speed of 9.0 m/s. What is the angular momentum of the ball? If the angular momentum of this ball were quantized in the same manner as the angular momentum of

    asked by Anonymous on April 22, 2014
  53. Physics

    A bullet of mass 3.2 g strikes a ballistic pendulum of mass 3.6 kg. The center of mass of the pendulum rises a vertical distance of 13 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed.

    asked by RD on March 1, 2011
  54. PHYSICS help!!!!! =)

    An object is rotating with an angular momentum 4.00 kg m2/s while being acted on by a constant torque 3.00 Nm. What is the angular speed of precession of the angular velocity of the object? A.1.33 rad/s. B.0.750 rad/s. C.12.0 rad/s. D.zero. E.It depends on

    asked by Elyse on November 13, 2012
  55. physics

    A bullet of mass 8 g strikes a ballistic pendulum of mass 2.0 kg. The center of mass of the pendulum rises a vertical distance of 10 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed.

    asked by joey on December 9, 2010
  56. Physics

    A 0.20kg ball on a string is whirled on a vertical circle at a constant speed.When the ball is at 3 o'clock position, the string tension is 20N.Find the tensions in the string when the ball is at 12 o'clock and 6 o'clock positions

    asked by Refiloe on March 31, 2015
  57. Physics

    A 0.20-kg ball on a stick is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the stick tension is 16N. Find the tensions in the stick when the ball is at the twelve o'clock and at the six o'clock positions.

    asked by Anonymous on October 9, 2012
  58. English

    What does pestilence mean as it is used in the following lines from Act V,Scene 2 of Romeo and Juliet? Friar John:Going to find a barefoot brother out,One of our order,to associate me, Here in this city visiting the sick, and finding him,the searches of

    asked by GummyBears16 on March 25, 2016
  59. Physics

    A 0.409 kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 19.5 N/m. The block rests on a frictionless surface. A 0.0500 kg wad of putty is thrown horizontally at the block, hitting it with an initial

    asked by Carden on April 29, 2010
  60. Physics

    5. The ball launcher in a pinball machine has a spring that has a force constant of 1.20 N/cm . The surface on which the ball moves is inclined 10.0° with respect to the horizontal. The spring is initially compressed 5.00 cm. Find (a) the launching speed

    asked by John Tucker on February 1, 2013
  61. Physics

    A small plane moving at 207km/hr flying 50.0m above the ground chases a convertible moving at 105km/hr down a straight highway. The plane has a package to drop in the car’s back seat. Assuming the vehicles maintain their speed and altitude and there is

    asked by Mercedes on September 18, 2014
  62. Math

    I have another problem that I don't know how to solve. A car travels along a straight road, heading east for 1 hour, then traveling 30 minutes on another road that leads northeast. If the car had maintained a constant speed of 40 mph, how far is it from

    asked by Cassie on January 16, 2014
  63. Physics

    3. What happens to the speed of ocean waves as they come close to shore? How can this be explained from what you've learned so far? (this the teacher means what do the lessons have to do with this question) 4. Sound travels faster through wood than through

    asked by Manie on January 3, 2017
  64. Math

    Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=-16t^2+50t+6 b) How long is the

    asked by Abbey on April 16, 2010
  65. differetial calculus-related rates

    LINEAR VS ANGULAR SPEED A wheel of a radius 30 centimeters revolves at a rate of 10 revolutions per second.A dot is painted at a point P on the rim of the wheel. a)find dx/dt as a function of ϴ. b)use a graphing utility to graph a function in part (a)

    asked by =) on September 16, 2014
  66. general physics

    We can interpret a distance traveled of 7.43 to mean a distance between 7.425 and 7.435 , thus rounding to 7.43 . Similarly, a time interval of 0.83 implies a time interval between 0.825 and 0.835 . Use these values to justify the rule for determining

    asked by shaxity on February 11, 2010
  67. Science

    A rocket is launched with a speed of 100m/s at an angle of 53.0 degrees above the horizontal with an acceleration of 30 metres per square seconds. After 3 seconds it's engines fail and the rocket proceeds to move as a projectile.Find the maximum height

    asked by Jesse on September 23, 2018
  68. physics

    A novice pilot sets a plane's controls, thinking the plane will fly at 2.50 * 2 to the 2nd power km/h to the north. if the wind blows at 75km/h toward the southeast, what will the plane's new resultant velocity be? use graphical techniques. Are you sure

    asked by yostina on December 25, 2006
  69. Physics

    Please help me! 1) Karen shouts across a canyon and hears an echo 5.7 s later. How wide is the canyon? The speed of sound is 343 m/s. Answer in units of m. 2) The distance between two consecutive nodes of a standing wave is 16.8 cm. The hand generating the

    asked by Mikayla on February 15, 2017
  70. physics

    modern oil tankers weigh more than a half-million tons and have lengths of up to one-fourth mile. Such massive ships require a distance of 5.0 km (about 3.0 mi) and a time of 20 min to come to a stop from a top speed of 30 km/h. What is the magnitude of a

    asked by Katie on March 30, 2014
  71. physics

    A block of wood with mass M = 0.440kg hangs at rest (Vi=0) from the ceiling by a string and a m = 0.0720kg elastic ball is thrown straight upward striking the bottom of the block with a speed of vi=5.74m/s. The ball rebounds from the block in a perfectly

    asked by Avinash on October 30, 2014
  72. Physics

    A car of mass 1300 kg is driving along a road at speed of 28m/s. As it approaches some traffic lights, the lights change to red and the driver applies his brakes causing the car to skid. The frictional force between the skidding tyres and the road is 0.8

    asked by Sean on October 25, 2015
  73. Physics

    A boy throws a ball off the top of a 30m high building with a speed of 10m/s at an angle of 30 degrees to the horizontal. How far from the base of the building does the ball strike? I broke in up into 2 dimensional: X horizontal values: Xi=0 Xf=?

    asked by Leo on June 11, 2016
  74. AP Physics

    Jean, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from Dulles Airport (Fig. 4-55). She notices that the string makes an angle of 24° with respect to the vertical while the aircraft

    asked by maddy on November 14, 2010
  75. Science -Check Answers-

    # 2. When __________ forces act on an object, they cause the object to move. •Balanced •Unbalanced (?CORRECT?, MY ANSWER) •Friction •Net # 4. Which of the following terms BEST describes the scenario below? A meteor moving through outer space

    asked by Mindy on March 3, 2014
  76. Pre calculus

    A tugboat is traveling at 30 miles per hour at a compass heading of 38 degrees. The current is from the direction of 125 degrees moving at 7 mph. Find the resultant speed and the direction of the boat. I understand the concept and that I must use the law

    asked by Hanna on February 16, 2015
  77. Physics

    3. What happens to the speed of ocean waves as they come close to shore? How can this be explained from what you've learned so far? (this the teacher means what do the lessons have to do with this question) 4. Sound travels faster through wood than through

    asked by Manie on January 4, 2017
  78. Math

    A ferry boat departed from port and traveled at a rate of 10 miles per hour at an angle 30° north of East across a large river. If the current is flowing at a rate of 4 miles per hour straight south, what is the speed and direction of the boat in the

    asked by Tyler on March 19, 2017
  79. Physics

    What is the speed of the rocket when it is 350 above the surface of the earth? A rocket starts from rest and moves upward from the surface of the earth. For the first 10 of its motion, the vertical acceleration of the rocket is given by a(y)=2.9, where the

    asked by Andrew on September 9, 2012
  80. algebra

    Shari drove for 90 miles in the city. When she got on the highway, she increased her speed by 20 mph and drove for 130 miles. If Shari drove a total of 4 hours, how fast did she drive in the city?

    asked by sara on November 27, 2016
  81. Physics Answer Check

    A note played by a musical instrument has a frequency of 130.8 Hz. What would be the length of the pipe if an organ pipe had this frequency as the fundamental and if the speed of the sound in the pipe is 350 m/s? f = v/2L 130.8(2L) = 350 2L = 2.68 L is

    asked by Anonymous on February 12, 2017
  82. physics

    The max speed of a 3.1 kg mass attached to a spring is .68 m/s and the max force exerted on the mass is 11N. What is the amplitude of motion on the mass? What is the force constant of the spring? And what is the frequency of oscillation?

    asked by fred on January 27, 2011
  83. physics

    A firecracker in a coconut blows the coconut into three pieces. Two pieces of equal mass fly off south and west, perpendicular to each other, at 25 m/s. The third piece has twice the mass as the other two. 1. What is the speed of the third piece? 2. What

    asked by Levin Need help for test! on November 5, 2014
  84. physics

    A flying bat emits squeaks at a frequency of 80 MHz, if a stationary observer picks up the frequency of the squeaks as 78 MHz, is the bat moving towards or away from the listener? Determine the speed of the bat.

    asked by Bafana on April 13, 2015
  85. Physics

    A 0.075-kilogram dart strikes a 2-kilogram stationary block of wood. If the dart sticks in the wood and the dart and wood fly off together at 1.5 meters per second, what was the approximate original speed of the dart?

    asked by Gene on January 15, 2017
  86. physics

    A stone is launched straight up by a slingshot. Its initial speed is 20.1 m/s and the stone is 1.30 m above the ground when launched. Assume g = 9.80 m/s2. (a) How high above the ground does the stone rise? (b) How much time elapses before the stone hits

    asked by Ali on January 24, 2012
  87. Physics

    A 110 g hockey puck sent sliding over ice is stopped in 14.9 m by the frictional force on it from the ice. (a) If its initial speed is 7.8 m/s, what is the magnitude of the frictional force? (b) What is the coefficient of friction between the puck and the

    asked by Ted on October 24, 2011
  88. physics

    Oil Flows through a horizontal cylindrical pipeline with an average speed of 1.2 m/s. The pipeline has a radius of 0.5 metres. Calculate the volume of oil (in cubic metres) which flows through this pipeline in one hour.

    asked by muller on June 21, 2014
  89. Science

    A body slides down a curved track which is one quadrant of a circle of radius R. If it starts from rest at the top of the track and there is no friction And the body starts from rest it's speed at the bottom of the track is

    asked by Thousif on July 31, 2017
  90. Physics

    a) A car accelerates uniformly from rest to a speed of 97.9 mi/h in 6.93 s.Find the constant acceleration of the car.Answer in units of m/s^2. b)Find the distance that the car travels during this time.Answer in units of m. How do you do this?

    asked by Landia on October 13, 2016
  91. Math, Precalc

    Sue rides her bike at a rate of 15 mph to May’s house 5 miles away. Then Sue and May walk to a park 2 miles away at a rate of 3 mph. What was Sue’s average speed for the entire trip?

    asked by Ashley on November 2, 2016
  92. physics

    a ball of mass 0.1kg makes an elastic head on collision with a ball of unknown mass,initially at rest .if the 0.1kg ball rebounded at one third of its original speed, what is the mass of the other ball?

    asked by gallium on September 12, 2011
  93. Physics

    The maximum speed of a 3.68-kg mass attached to a spring is 0.688 m/s, and the maximum force exerted on the mass is 11.6 N. What is the amplitude of motion for this mass? (in m) What is the force constant of the spring? (in N/m) What is the frequency of

    asked by Madison on April 26, 2015
  94. physics

    A satellite is in orbit about Earth. Its orbital radius is 7.51×107 m. The mass of the satellite is 5415 kg and the mass of Earth is 5.974×1024 kg. Determine the orbital speed of the satellite in mi/s. 1 mi/s = 1609 m/s.

    asked by mac on February 26, 2011
  95. physics

    A daredevil is shot out of a cannon at 43.0° to the horizontal with an initial speed of 25.0 m/s. A net is positioned a horizontal distance of 50.0 m from the cannon. At what height above the cannon should the net be placed in order to catch the

    asked by alecia on November 8, 2010
  96. Physics

    Tom the cat is chasing Jerry the mouse across the surface of a table 1.4 m above the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 5.8 m/s. Where will Tom strike the floor?

    asked by James on September 10, 2011
  97. Mechanics

    a ship leaves a port and travels on asteady course 40*N of due east at a steady speed of 8.kmh^-1. how far due north and due east of the port is the ship after sailing after 12 hours

    asked by Naim on October 31, 2015
  98. P.E/Health

    1. When consuming fats the healthiest choice is foods high in? A. saturated fats B. unsaturated fats * C. trans fat D. cholesterol 2. The body's main energy source should come from what essential nutrient? A. protein B. fat C. carbohydrate*** D. minerals

    asked by Cami on November 22, 2015
  99. PHYSICS

    A long, straight wire lies on a horizontal table and carries a current of 1.45 µA. In a vacuum, a proton moves parallel to the wire (opposite the current) with a constant speed of 3.00 104 m/s at a distance d above the wire. Determine the value of d.

    asked by Physics on May 26, 2010
  100. physics

    question: your propessor enters a dogsled race during the winter break to get started she pulls the sled (total mass 80kg) with a force of 180N at 20degrees the sled moves 5m along horizontal. find the work she does find the final speed of the sled after

    asked by jerome on August 25, 2014

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