Suppose the same (1,560 kg) elevator with the same (220 kg) load descends at 2.90 m/s. What is the power delivered by the motor? (Energy must be removed to slow the elevators descent.)

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.