3. Mention one application of expansion on heating and contraction on cooling. answers in 20 word
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-To fit metal rim on a wooden wheel which is smaller than the wheel by heating the rim. Contraction-We pour cold water over the metal rim,so it contracts and fits tightly over the wheel.
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Expansion-To fit metal rim on a wooden wheel which is smaller than the wheel by heating the rim. Contraction-We pour cold water over the metal rim,so it contracts and fits tightly over the wheel.
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