Question

The metal rim of a wooden wheel is smaller in size. Write in detail
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Answer 1

Answer:

The metal rim is always made slightly smaller than the wooden wheel. The metal rim is heated. On heating, the rim expands and fits onto the wheel. Coldwater is then poured over the rim. Due to cooling the metal rim contracts and fits tightly onto the wheel.

Answer 2

Answer:

The reason is that : Metal rim contrast and expend due to heat.