In a steady two-dimensional flow, particle trajectories are given byx(t) =x0cosγt; y(t) =y0sinγta. from these trajectories determine the lagrangian particle velocity componentsu(t) =dx/dtandv(t) =dy/dt. convert these to eulerian velocity componentsu(x, y) andv(x, y). note that the eulerian velocity does not depend on time.

An air compression refrigeration system is to have an air pressure of 100 psia in the brine tank and an allowable air temperature increase of 60°f for standard vapor compression cycle temperatures of 77 f entering the expansion cylinder and 14 f entering the compression cylinder, calculate the coefficient of performance a. 2.5 b 3.3 c. 4.0 d. 5.0