College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 76

Batteries are rated in terms of ampere-hours (A · h). For example, a battery that can deliver a current of 3.0 A for 5.0 h is rated at 15 A · h. (a) What is the total energy, in kilowatt-hours, stored in a 12-V battery rated at 55 A · h (b) At $0.12 per kilowatt-hour, what is the value of the electricity that can be produced by this battery