Describe the relative amounts of potential and kinetic energy for a book in the following situations.

a. the book on a high shelf which is 2 meters of the ground.
b. the book after it has fallen off a 2-meter shelf and is now 1-meter of the ground.
c. the book just before it hits the ground.

Car batteries are often rated in amp-hours. this rating indicates the quantity of charge that can pass through the battery before the battery's chemical energy must be restored by the car's generator or some other source. the amp-hour unit is convenient for simple calculations. for example, a 60-amp-hour battery can supply a current 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 58 a-h, 10 v car battery(b) a 1.3 a-h, 1.7 v flashlight battery