An air conditioner draws 12 A at 220-V ac. The connecting cord is copper wire with a diameter of 1.628mm.
(a) How much power does the air conditioner draw?
(b) If the total length of wire is 15m, how much power is dissipated in the wiring?
(c) If no. 12 wire, with a diameter of 2.053mm, was used instead, how much power would be dissipated?
(d) Assuming that the air conditioner is run 12h per day, how much money per month (30days) would be saved by using no. 12 wire? Assume that the cost of electricity is 12 cents per kWh