A2.64-kg copper part, initially at 400 k, is plunged into a tank containing 4 kg of liquid water, initially at 300 k. the copper part and water can be modeled as incompressible with specific heats 0.385 kj/kg ? k and 4.2 kj/kg k, respectively. for the copper part and water as the system, determine (a) the final equilibrium temperature, in k, and (b) the amount of entropy produced within the tank, in kj/k. ignore heat transfer between the system and its surrounding