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If 2.91×1020 electrons flow through a cross section of a 4.43 mm diameter Gold wire in...

If 2.91×1020 electrons flow through a cross section of a 4.43 mm diameter Gold wire in 5.75 s, then what is the drift speed of the electrons? (The density of conduction electrons in Gold is n = 5.90×1028 1/m3.)
(in mm/s)

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