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.

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]