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Thermal Expansion of Solids

In the ball a...

Question

In the ball and ring experiment, if the ball after heating is left to cool on the ring for some time, the ball again passes through the ring. Explain the reason.

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Solution

On heating, the ball expands and increases in size and cannot pass the ring when left on it. As the ball cools, it contracts, size becomes less than the ring and passes the ring.

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