Adriver on a leveltwo-lane highway observes a
truck completely blocking thehighway. the driver was able to stop
her vehicle only 20 ft. fromthe truck. if the driver was driving at
60mph, how far was she fromthe truck when she first observed
it?

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?