When two gears mesh, one is called the driver gear because it a) is the follower gear
b) is the smaller gear
c) moves in anticlockwise direction
d) moves in a clockwise direction
e) transmits the power to the driven gear

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

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.

Positive ions differ from neutral atoms in that