a cylindrical core plug having a diameter of 5.4*10m and a length of 0.28m was floaded with water of velocity of 0.001 and a steady state of the 1.0*10 the pressure difference across the core was 1.0*10pa calculate the permeability of the core plug in meters

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?