Question: The drag coefficient for a smooth sphere is shown below. Determine the speed at the critical Reynolds number for a 42-mm-diameter sphere in air. 0.5

The drag coefficient for a smooth sphere is shown below. Determine the speed at the critical Reynolds number for a 42-mm-diameter sphere in air. 0.5 0.4 0.3 CD 0.2 0.1 103 104 105 107 106 Re = Dv/v

0.5 0.4 0.3 CD 0.2 0.1 103 104 105 107 106 Re = Dv/v

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