g A circular loop of wire of radiusalies in thex−yplane. A small light bulb with resistanceRis attachedat one point. An rotating arrangements external magnet is~B=B(cos(ωt)ˆx+ sin(ωt)ˆz).a) How much current is produced as a function of time? Make sure you indicate which direction it is flowing. b) How much energy energy is consumed by the bulb in the time it takes the field to return to its originalorientation.

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.