Answer to Question #65469 in Electric Circuits for Helen
A power line carries a current of 1.25×103 A over a distance of 2.50×102 km. The line
is made of copper (Copper: Cu, atomic weight 63.5, density of 8.920 g/cm3
to have one free electron per every copper atom) and has a diameter of 2.00 cm. How
long does it take an individual electron to travel the entire length of the power line?