Dust particles of diameter 0.06 mm and density 1.6 g/cm3
Chapter 11, Problem 68P(choose chapter or problem)
Problem 68P
Dust particles of diameter 0.06 mm and density 1.6 g/cm3 are unsettled during high winds and rise to a height of 350 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 15°C, and their velocity. Disregard the initial transient period during which the dust particles accelerate to their terminal velocity, and assume Stokes law to be applicable.
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