1. The drag coefficient for a smooth sphere is shown below. Determine the speed at the critical...

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1. 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. 2. Plot a curve of drag vs. velocity for a 1.65-in.-diameter sphere in air between velocities of 50 fps and 400 fps. 3. For what wind velocities will a 12.7-mm-diameter cable be in the unsteady wake region of Figure 12.2?

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Ans - 1 In fluid dynamics, the drag coefficient is a dimensionless amount this is used to quantify the drag or resistance of an item in a fluid environment, together with air or water. It is used withinside the drag equation wherein a decrease drag coefficient suggests the item may have much less aerodynamic or hydrodynamic drag. The drag coefficient is constantly related to a specific floor vicinity.[3] The drag...

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