Alarge-particle composite consisting of tungsten particles within a copper matrix is to be prepared. if the volume fractions of tungsten and copper are 0.70 and 0.30, respectively, estimate the upper limit for the specific stiffness of this composite, given the data that follow.
specific gravity:
copper - 8,9
tungsten - 19,3
modulus of elasticity (gpa):
copper - 110tungsten - 407

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?