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Question: find the electrical resistance of a wire on a high...

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Find the electrical resistance of a wire on a high voltage tower is 60 miles long, 2 inches in diameter, and made of pure aluminum (resistivity = 2.8 10 ohm*m). If the current in the wire is 5000cos(2700t) amperes, about how many electrons exit or enter the wire in each half-cycle of the current?

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