In a production woodworking shop, 50-??m spherical dust particles were blown into the air while a piece of oak furniture was being sanded.
(a) What is the terminal velocity of the particles as they fall through the air?
(b) Neglecting air currents that are present, how long would it take the cloud of sawdust to settle out of the air and fall 2 m to the ground? The density of dry oak is approximately 750 kg/m3.
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