- The automobile has a speed of 80 ft/s at point A and an acceleration a having a magnitude of 10 ft/S 2 , acting in the direction shown. Determine the radius of curvature of the path at point A and the tangential component of acceleration.

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?