Aload of 90 n falls from a height of 150 mm onto a collar attached to the lower end of a rigidly held rod. the rod is vertical and 900 mm long. it has a diameter of 12 mm for a length of 600 mm and the remaining 300 mm is 9 mm in diameter. calculate the maximum stress induced in the rod. (take e as 210 gpa.)

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