Acylindrical metal specimen having an original diameter of 11.86 mm and gauge length of 54.0 mm is pulled in tension until fracture occurs. the diameter at the point of fracture is 6.59 mm, and the fractured gauge length is 73.0 mm. calculate the ductility in terms of (a) percent reduction in area (percent ra), and (b) percent elongation (percent el).

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?