A 2,000 kg car is parked at the top of a 30 m high hill. What is its potential
energy?
O A. 90,000 u
B. 2,000 J
O C. 60,000
D. 588,000 J

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Which is the most accurate name for the ionic compound cas?

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.