Which of the following statements are TRUE? 1) Kinetic energy is conserved. 2) Linear momentum is conserved. 3) Angular momentum of the stick+puck is conserved about the center of mass of the combined system. 4) Angular momentum of the stick+puck is conserved about the (stationary) point where the collision occurs.

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above