Question:-
Air flows past a golf ball of 20 mm radius. It is obsrved that the boundary layer becomes turbulent at Reynolds number of 2 x 105. If the kinematic viscosity of air is 1.5 x 10-5 m2/s , then the speed of air when the flow becomes turbulent is
Option (A)
150 m/s
Option (B)
90 m/s
Option(C)
75 m/s
Option(D)
62.5 m/s
Correct Option:
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question-answer-faq-1848