An aluminum frying pan of mass 1.5 kg is at 180oC, when it is plunged into a sink containing a mix of 4.5 L water and 0.5 kg of ice at its melting point (i. e., water and ice are in equilibrium at 0oC). Assuming that none of the water boils and that no heat is lost to the surroundings, find the equilibrium temperature of the water and the pan.

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