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In a pollution control experiment, minute solid particles (typical mass 1 × 10^{−13} slug) are dropped in air. The terminal speed of the particles is measured to be 0.2 ft/s. The drag of these particles is given by *F _{D}* =

*kV*, where

*V*is the instantaneous particle speed. Find the value of the constant

*k*. Find the time required to reach 99 percent of terminal speed.

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# Chapter 1 Solutions

Fox and McDonald's Introduction to Fluid Mechanics

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