Technician A says that high-pressure gas cylinders can be hauled on their side in a pickup truck, as long as they are secured with chains. Technician B says that a welder is grounded, and because of this technicians can weld even if the floor is wet. Who is correct? a. Technician A only
b. Technician B only
c. Both Technicians A and B
d. Neither Technician A nor B

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?