If the power of an engine is known and the amount of time that the engine exerts this power is known, what can be calculated?
the force exerted by the engine
the distance that the engine pushes an object
the mass of the object pushed by the engine
the work done by the engine in the given time

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.

If you let go of the notebook after lifting it, will it move? how?

Anthropology is the study of the effects of disease on the body, while forensic anthropology studies the disease of crime a.) true b.) false