The 164-kg spool has a radius of gyration about its mass center of kg = 300 mm. if the couple moment is applied to the spool and the coefficient of kinetic friction between the spool and the ground is μk = 0.2, determine the angular acceleration of the spool, the acceleration of g and the tension in the cable

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