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A rubber ball of mass 16.0 g is dropped from a height of 1.80 m onto a floor. The velocity of the ball is reversed by the collision with the floor, and the ball rebounds to a height of 1.40 m. What impulse was applied to the ball during the collision?
A sanding disk with rotational inertia 8.1 x 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of magnitude 20N·m about central axis of the disk. About that axis and with torque applied for 29 ms, what is the magnitude of (..
A person who weighs 645 N is riding a 94.9 N mountain bike. what is the area of contact between each tire and the ground
At 34C, the resistance of a segment of gold wire is 53.6 . When the wire is placed in a liquid bath, the resistance decreases to 97.1. What is the temperature of the bath
A train is rounding a circular curve whose radius is 200 m. At one instant, the train has an angular acceleration of .0015 rad/s2, Determine the angle of the total acceleration relative to the radial direction
Why is it sometimes better to use a small telescope in orbit around the Earth than it is to use a large telescope on a mountaintop?
Calculate the electric field from four point-charge: +q at -d and -q at -d/2; 2q at d and -2q at d/2 on the z-axis, First calculate the electric potential, and then calculate its radient.
A block of mass of 4kg is dragged 2m along a horizontal surface by a force F=30N acting on a 53 degree to the horizontal. Find change in kinetic energy of the block
A semicircle of radius a is in the first and second quadrants, What is the direction of the net electric field at the origin produced by this distribution of charge (+x,-x,+y,-y direction)
q1. a certain kind of glass has an index of refraction of 1.660 for blue light of wavelength 420 nm and an index of
A hand-pumped water gun is held level at a height of 0.84 m above the ground and fired. Find the gauge pressure of the water gun's reservoir
how to estimate the initial temperature of the hot horseshoe.
If the angular magnification of an astronomical telescope is 38 and the diameter of the objective is 66 mm, what is the minimum diameter of the eyepiece
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