(a) Using Thin Airfoil Theory, write down the equation of lift coefficient for Symmetric airfoil Cambered airfoil.
(b) Comment on the location of aerodynamic centre and centre of pressure for both types of airfoil i. e. symmetric and cambered.
(c) Consider an NACA 0012 airfoil with a 2-m chord in an airstream with a velocity of 50 m/s at standard sea-level conditions. If the lift per unit span is 1353 N, what is the angle of attack, using Thin airfoil theory?

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Fluids at rest possess no flow energy. a)- true b)- false

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.