Which option distinguishes the step in the engineering design phase described in the following scenario? Dave designs hockey equipment. He learns that another company, Cascade, uses Seven Technology, a linear system that absorbs maximum energy, to develop safer, stronger hockey helmets.

write engineering requirements

evaluate the competition

collect benchmarking information

identify customer needs

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?