A submerged object is anchored in fresh water (60oF) that flows at the rate (actually speed) of 8 ft/s. The resistance of a 1:5 model in a wind tunnel at standard conditions (STP) is 4.5 lbf. What force acts on the prototype (I. e. the submerged object) under dynamically similar conditions, and what will be the air speed around the model

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