are soldered (joined) together. Initially each of the wires has a length of 1m at 10 C. Now the end P is maintained at 10 C
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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 1m at 10 C. Now the end P is maintained at 10 C, while the end are soldered (joined) together. Initially each of the wires has a length of 1m [...]