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A meter-scale is made of copper and iron rods as shown in the figure. If the length of copper rod is λ meter and the coefficients of linear expansion of copper and iron are α1 and α2 respectively, then the equivalent coefficient of linear expansion of the combined material of the meter-scale is |
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Answer» A meter-scale is made of copper and iron rods as shown in the figure. If the length of copper rod is λ meter and the coefficients of linear expansion of copper and iron are α1 and α2 respectively, then the equivalent coefficient of linear expansion of the combined material of the meter-scale is |
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