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Problem 1. (20 points) Air flow at 15 m/s past a thin flat plate. Estimate the distance x from the leading edge at which the boundary layer thickness will be

(a) 10 cm and (b) 1mm. (You will need to guess if the flow is laminar or turbulent and then check that you assumption was correct.) Use a transition Reynolds number of 5x105. [Ans part a: 5.96 m]

Fig: 1