A bulldozer uses a 500 N force to push a load of dirt 16 m to the worksite. How much work does the bulldozer perform A. 8000 J
B. 500 J
C. 3,700 J
D. 65,000 J

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Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

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.