Copper has 8.5×1028 free electrons per cubic meter. A 69.0 cm length of 12-gauge copper wire, that is 2.05 mm in diameter, carries 4.50 A of current. How long does it take to travel the wire?
Repeat Part A for a 6 gauge copper wire.

Aswimmer is determined to cross a river that flows due south with a strong current. initially, the swimmer is on the west bank desiring to reach a camp directly across the river on the opposite bank. in which direction shoud the swimmer head? a. the swimmer should swim southeast. b. the swimmer should swim south. c. the swimmer shuold swim northeast. d. the swimmer should swim due north. e. the swimmer should swim due east.