Air at 20 kPa and 20 �C flows across a flat plate 60 cm long. The free stream velocity is 30
m/s, and the plate is heated over its total length to a temperature of 55 �C. The fluid
velocity is measured 30 cm from the edge of the plate and found to be 22.5 m/s.
a. Calculate the Reynolds number.
b. Is the flow laminar or turbulent? Justify your answer.
c. Calculate the height of the boundary layer at the point where the flow velocity is