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A closed card board tube is 50 cm in len...

A closed card board tube is 50 cm in length an contains 200g of lead shots which occupy 2 cm of the length of the tube when it is held vertically. The tube is inverted quickly so that the end which was previously above is now below. This process is repeated 400 times. If the specific heat of lead is `0.32 cal g^(-1).^(@)C^(-1)`, calculate the rise in temperature of the lead shots.

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