Question: A tremendous amount of study has gone into the fluid effects of air over various spheres due to the impact on sports and recreation. Golf

A tremendous amount of study has gone into the fluid effects of air over various spheres due to the impact on sports and recreation. Golf balls, for example, are dimpled due to the tremendous effect on flow characteristic and resulting drag force. Chapter 17 states that for a spherical body moving through a static fluid, the standard Reynolds number Eq. (8€“1) can be used if the value of D is taken to be the diameter of the sphere. Calculate the Reynolds number through air at standard conditions at sea level (see Appendix E) for the following applications:

Diameter Velocity 55 mph Volleyball serve: 8.5 in 7 cm Cricket pitch: 135 km/h 95 mph Baseball pitch: 2.88 in 13 mm Musk

Diameter Velocity 55 mph Volleyball serve: 8.5 in 7 cm Cricket pitch: 135 km/h 95 mph Baseball pitch: 2.88 in 13 mm Musket ball shot: 440 m/s

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