A two-dimensional, flat plate is inclined at a positive angle of attack in a supersonic air stream of Mach 2.0 (M1) and P1 = 50 kPa. Below the plate, an oblique shock wave starts at the leading edge, making an angle of 420 with the stream direction. On the upper side, an expansion occurs at the leading edge.

(a) Find the angle of attack of the plate.
(b) What is the pressure on the lower surface of the plate?
(c) What is the pressure on the upper surface of the plate?

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Calculate the bore of a cylinder that has a stroke of 18 inches and an extension time of 6 seconds at a flow rate of 4 gal/min.

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1