The pressure drop in a pipe is function of the density and viscosity of the fluid being transported, the average velocity of the flow, and the length, the diameter, and the roughness of the pipe. Using the Buckingham Pi Theorem determine the non–dimensional parameters representing this problem. Choose the density, average velocity and diameter of the pipe as repeating variables.

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?