Question

Car batteries are often rated in amp-hours. This rating indicatesthe quantity of charge that can pass through the battery before thebattery's chemical energy must be restored by the car's generatoror some other source. The amp-hour unit is convenient for simplecalculations. For example, a 60-amp-hour battery can supply acurrent of 1.0 A for 60 h (or 60 A for 1.0 h) before going dead.Find the energy stored in the following.
(a) a 62 A-h, 11 V car battery
(b) a 1.1 A-h, 1.4 V flashlight battery