# Power and Resistance

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A wire 1.2 m long and 0.4 mm diameter has a resistance of 4.9. Calculate the resistance of another wire of the same material whose length is 0.8 m and diameter is 0.24 mm.

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#### Solution Preview

Recall:

R = pL/A

where resistivity, p, is constant since it ...

#### Solution Summary

This solution is provided in 54 words. It provides an equation for resistance to find resisitivity and then resistance of the second wire.

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