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A cockroach of mass m lies on the rim of a uniform disk of mass 6 m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular velocity of 0.483 rad/s. Then the cockroach walks halfway to the center of the disk.
(a) What then is the angular velocity of the cockroach-disk system?
(b) What is the ratio K/K0 of the new kinetic energy of the system to its initial kinetic energy?
A box slides down a rough, 25 Degree incline with a coefficient of kinetic friction between the box and incline of 0.7. What will be its speed at the bottom
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A double slit with d= 0.02 mm is illuminated by a blue laser at 450 nm and a red laser at 650 nm, what is the distance separating the blue and red fringe
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