The difference in entropy AS = Sg-SA for two states A and B of a system can be computed as the integral of dQ/T provided:
A. the energy absorbed as heat by the system is first computed.
B. the change in internal energy is first computed.
C. A and B are on the same adiabat.
D. a reversible path is used for the integral.
E. A and B have the same temperature.

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system

What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules? a. 75% b. 35% c. 25% d. 85%