1. Air at atmospheric pressure and room temperature (27 C)
flows over a flat plate at a speed of 2 m/s. The length of the plate is 0.5 m.
Find the thickness of the boundary layer at the middle of the plate (x = 25 cm)
and at the trailing edge (x = L).
2. A blackbody is at a temperature of 1500 K. Find the rate
of radiant energy emission in the cone shown in the figure of Example IVd.2.5
for _ = 60o at wavelength 2 to 4 µm.