Question

when cold water is poured over a hot iron rim, it​

Answer 1

Answer:

The iron rims mounted on wooden wheel expand in summer due to heat. There is a possibility that iron rim may expand to such an extent that they may slip from wooden wheel. To prevent such a slippage, cold water is poured over the wheels which does not allow the rims to expand.

Answer 2

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when cold water is poured over a hot iron rim it contracts