A straight rod consists of a 12-cm-long piece of aluminum


A straight rod consists of a 1.2-cm-long piece of aluminum attached to a 2.0-cm-long piece of steel. By how much will the length of this rod change if its temperature is increased from 20 ?C to 40 ?C? note: answer in cm please.

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Physics: A straight rod consists of a 12-cm-long piece of aluminum
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