A cube of copper of mass mc = 75g is placed in an oven at a temperature of T = 600? F until it comes to thermal equilibrium. The cube is the dropped into an insulated beaker containing mw = 200g of water. The heat capacity of the beaker alone is Cb = 190J/K. Initially, the water and the beaker are at Ti = 54? F. What is the ?nal equilibrium temperature of the entire system?