At shaft shoulder, The dimensional relations are given by D/d= 1.3, r/d= 0.06. The loads during rotations are moment of 350 N-m and a steady torque of 280 N-m. Material of shaft is AISI 1050 CD. Design d for a factor of safety of 1.5

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?