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The ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially each of the wires has a length of 1 m at 10∘C. Now the end P is maintained at 10∘C, while the end S is heated and maintained at 400∘C. The system is thermally insulated from its surroundings. If the thermal conductivity of wire PQ is twice RS and the coefficient of linear thermal expansion of PQ is 1.2×10−5K−1, the change in length of the wire PQ is |
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Answer» The ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially each of the wires has a length of 1 m at 10∘C. Now the end P is maintained at 10∘C, while the end S is heated and maintained at 400∘C. The system is thermally insulated from its surroundings. If the thermal conductivity of wire PQ is twice RS and the coefficient of linear thermal expansion of PQ is 1.2×10−5K−1, the change in length of the wire PQ is |
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