Air flows past a cricket ball of 40 mm diameter. It is observed that t – McqOptions

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1.	Air flows past a cricket ball of 40 mm diameter. It is observed that the boundary layer becomes turbulent at a Reynolds number of 200000. If the kinematic viscosity of air is 1.5 × 10-5 m2/s, then the speed of air when the flow becomes turbulent is:
A.	25 m/s
B.	75 m/s
C.	100 m/s
D.	50 m/s
Answer» C. 100 m/s

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