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Q. A steel ball is dropped from a height of three meters onto a concrete floor. It bounces a large number of times but eventually comes to rest. Estimate the ball's rise in temperature.

Q. Two astronauts, one of mass 65 and the other 83 , are initially at rest in outer space. They then push each other apart.

How far apart are they when the lighter astronaut has moved 11.

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Category:- Physics
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