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Two uniform rods AB and BC have Young's modulii 1.2×1011 N/m2 and 1.5×1011 N/m2 respectivey. If coefficient of linear expansion of AB is 1.5×10−5/°C and both have equal area of cross section, then coefficient of linear expansion of BC, for which there is not shift of the junction at all temperatures, is |
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Answer» Two uniform rods AB and BC have Young's modulii 1.2×1011 N/m2 and 1.5×1011 N/m2 respectivey. If coefficient of linear expansion of AB is 1.5×10−5/°C and both have equal area of cross section, then coefficient of linear expansion of BC, for which there is not shift of the junction at all temperatures, is |
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