A60-lb aluminum bar, initially at ta = 190of, is placed in a tank together with 190 lb of liquid water, initially at tw = 70of, and allowed to achieve thermal equilibrium. the aluminum bar and water can be modeled as incompressible with specific heats ca = 0.216 btu/lb·or and cw = 0.998 btu/lb·or, respectively. consider the aluminum bar and water as the system and ignore heat transfer between the system and its surroundings.