Block A starts from rest and moves downward with a constant acceleration. block B moves up with a constant velocity of 12 cm/s. Knowing that after 4 seconds from the start the velocity of A is 15 m/s/ determine the change in position of block C when block A drops 6 cm.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?