A three-phase motor is connected to a three-phase line that has an abc phase sequence and is supplied by a 15A current at a 0.85 lagging power factor. If a single-phase motor withdrawing 5A current at a 0.707 lagging power factor is connected across lines a and b of the three-phase power line, determine the total current in each lin

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?