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A kid sits in a sled on a horizontal snowy surface. The combined mass of the kid and the sled is 34 kilogram. The kinetic coefficient of friction is 0.39. Initially the kid and her sled are at rest. After you pull the sled 20 meter the velocity of the sled is 1.5 meter per second. Find how much total mechanical work (J) did you do as you pulled the sled and kid 20 meter?
A glass flask whose volume is 1000.37cm^3 at 0 degree celsius is completely filled with mercury at this temperature. Compute the coefficient of volume expansion of the glass
when you walk past an open door of a room in your house in which a person is speaking you can hear the person long
Yang can focus on objects 150 centimeter away with a relaxed eye. With a full accommodation, she can focus on objects 20 centimeter away. find what will her near point be while wearing her glasses
A cylinder made of insulating material has a uniform volume charge density. The cylinder is 20m in length and a radius 0.2m. The total charge on the cylinder is 4nC. Half way down the cylinder's length, what is the electric field outside the cylinder..
A charged particle is injected at 153 m/s into a 0.0623-T uniform magnetic magnetic field perpendicularly to the field. What is the charge-to-mass ratio of this particle
If the tension in a guitar string is increased by 20%, by what percentage does the wave speed increase? Harmonic waves are produced by a source that isoscillating in SHM. Which one of the following statements is correct concerning harmonic waves?
A 62.9 kg ice skater moving to the right with a velocity of 2.07 m/s throws a 0.193 kg snow- ball to the right with a velocity of 31.6 m/s relative to the ground. What is the velocity of the ice skater
A man opens a door by applying a 14 Newton force perpendicular to it at a distance 0.90 meter from the hinges. Calculate what was the average power delivered
A circular-motion addict of mass 90 kg rides a Ferris wheel around in a verticalcircle of radius 10 m at a constant speed of 6.3 m/s. What is the period of the motion?
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. What is the angular acceleration in the second training exercise
A golf ball with mass 45.90 g and diameter 42.60 mm is struck such that it is moving with a speed of 51.93 m/s, What is the kinetic energy of the golf ball
a if a mass of 2kg is attached to a string of length 1m and pulled back to the angle shown 30 degrees from straight
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