Q&A/Class 6/Science

Explain how a metal rim slightly smaller than a wooden wheel can be fixed on it.

Class 6CBSEScienceChapter: Changes Around Us
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The metal rim is always made slightly smaller than the wooden wheel. The metal rim is heated. On heating, the rim expands and fit onto the wheel. Cold water is then poured over the rim. Due to cooling the metal rim contracts and fits tightly onto the wheel.

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