3. (10 pts) Suppose an airplane with its engine off has a maximum lift-to-drag ratio of 14, and its CL at max lift to drag ratio is 0.64. Its weight is 3,000 lb, and its wing area is 175 ft2. Determinea) The minimum glide angleb) The maximum range along the ground, starting from an altitude of 10,000 ft. c) When gliding at the minimum glide angle, determine the velocity at an altitude of 10,000 ft and at an altitude of 2,000 ft.

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.