Thin airfoil of arbitrary shape: The mean camber line of an airfoil of chord length is given by y = 2.6595 {( x ) 3 − 0.6075 ( x ) 2 + 0.1147 ( x )} for 0 ≤ x ≤ 0.2025 and y = 0.02208 {1 − ( x )} for 0.2025 ≤ x ≤ 1 (a) Find the zero-lift angle of attack. (b) Find the lift coefficient, moment coefficient about the quarter-chord point, and the location of the center-of-pressure at = 4 0

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]