Physics

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a tourist drops 1-liter water filled balloon from the top of the Washington monument (170 m high).If air resistance is negligible and almost all the motion energy heats the water,find the increase in temperature of water when it hits the pavement?

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    A stone is whirled at the of a rope 20cm long making 5 complete revolution in 2seconds.calculate the angular velocity and the linear speed and the distance covered in 10seconds.

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