velocity*area*charge=current where..
charge=e*density=e*avagnumber*8.95/63.5
solve for delocity
A copper wire that has a diameter of 2.9 mm carries a current of 39.0 A. Assuming that each copper atom contributes one free electron to the metal, find the drift velocity of the electrons in the wire. The molar mass of copper is 63.5 g/mol and the density of copper is 8.95 g/cm3.
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