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An ice skater spins at .8 rev/s with arms extended. Pulls arms in and spins 5.3 rev/s. Change of moment of inertia is what factor of original.
A race car starts from rest and travels east along a straight and level track. What is the acceleration of the car when vx = 12.0m/s
A square insulating sheet 76.0cm on a side is held horizontally. The sheet has 6.30nC of charge spread uniformly over its area. Calculate the electric field at a point 0.250 mm above the center of the sheet
Agent Arlene devised the following method of measuring the muzzle velocity of a rifle. She fires a bullet into a 4.600-kg wooden block resting on a smooth surface, What is the speed v of the bullet
The 1000 kilogram mass of a car includes four tires, each of mass (including wheels) 34 kilogram and diameter 0.80 meter. Find the fraction of the kinetic energy in the tires and wheels
A 60 skydiver can be modeled as a rectangular "box" with dimensions 21 41 1.8. What is his terminal speed if he falls feet first
If the electron drops back to the ground state, will a photon be emitted? If it is true then, find the energy or wavelength of the emitted photon compared to that of the absorbed photon
A single chain supports a pulley whose weight is 40 N. Two identical 80-N weights are then connected with a cord that passes over the pulley
what is the total of the daily increases in time (that is, the sum of the gain on the first day, the gain on the second day, etc.)?
What weight of water is displaced by a 100-ton floating ship? What is the buoyant force that acts on the ship
Two earthquake waves of the same frequency travel through the same portion of the Earth, What is the ratio of the amplitudes of the two waves
two particles a and b strike each other as shown. ma 2.9 kg and mb 1.3 kg. just before the collision va 2i 8j ms
Two converging lenses, one with f = 5.0 cm and the other with f = 50 cm, are made into a telescope. What are the magnification of this telescope
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