Estimate the remaining life in revolutions of a 02-30 mm angular-contact ball bearing already subjected to 216000 revolutions with a radial load of 15 kn, if it is now to be subjected to a change in load to 25.05 kn. note: this is a multi-part question. once an answer is submitted, you will be unable to return to this part.

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?