posted by Brette .
A length of wire has a radius of 3.00 ~ 10-3 m and a resistance of 0.200 ƒ¶. When the potential
difference across the wire is 10.0 V, the electron drift speed is found to be 2.98 ~ 10-4 m/s. On the
basis of these data, calculate the density of free electrons in the wire.