A 260 km long-high voltage transmission line 20 cm in, Physics

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A 260 km long-high voltage transmission line 20 cm in

A 260 km long-high voltage transmission line 2.0 cm in diamter carries a steady current of 910A. If the conductor is copper with a free charge density of 8.8x10^28 electroncs per cubic meter, how many does it take one electron to travel the full length of the cable? ________years

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