Type one to two paragraphs that describe the potential energy, kinetic energy, and the thermal energy of the cart.
a) Type one to two paragraphs describing the changes in potential, kinetic, and thermal energy
of the cart at each of the four positions along the track. Be sure to define your system. Also
include the positions of the cart where each form of energy is at its maximum and minimum
values.

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.