4.4: I have four objects with identical mass and radii, but different shapes, and exert the same torque on each. Rank these four objects according to their final rotational velocities after 30 seconds of this applied torque: A) A solid cyllander B) A hoop C) A solid Sphere D) A hollow Sphere

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.