A357-magnum bullet has kinetic energy of 540 ft lb at 50 yards from the pistol. if it strikes and comes to a rest inside a 1.0 kg block of wood (with a specific heat capacity of 1700 j/kg k), by how much would the block's temperature change? the bullet is lead and weighs 158 grains (1.0 grain is equivalent to 0.0648 g).

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