A 137-cm-long wire is made by welding a 13-mm-diameter


A 137-cm-long wire is made by welding a 1.3-mm-diameter, 26-cm-long copper wire to a 0.31-mm-diameter, 111-cm-long iron wire. What is the resistance of the composite wire? (Give answer in %u2126.)

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Physics: A 137-cm-long wire is made by welding a 13-mm-diameter
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