Engineering, 14.05.2021 17:20, luisr0754

Dust particles of diameter 0.06 mm and density 1.6 g/cm3are unsettled during high winds and rise to a height of 200 m by the time things calm down. Estimate how long it takes for the dust particles to fall back to the ground in still air at 1 atm and 30 C, and their velocity. Disregard the initial transient period during which the dust particles accelerate to their terminal velocity, and assume Stokes law (CDcalculatedat very low Reynolds number) to be applicable.

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Dust particles of diameter 0.06 mm and density 1.6 g/cm3are unsettled during high winds and rise to...