Calculate the electric potential energy in a capacitor that stores 9.40 10-10 c of charge at 50.0 v. use .

Name two kinds of practical electric pumps.

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.

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.