# 1. Air at atmospheric pressure and room temperature (27 C) flows over a flat plate at a speed of 2..

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.