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Acrosol particles with an average diameter of 5 m and a density of 1000 kg / m3 are spread to a room with a

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Acrosol particles with an average diameter of 5 m and a density of 1000 kg / m3 are spread to a room with a floor area of 20 m2 and a height of 3.5 m. How long does it take for all 5 m particles to settle on the floor (dry deposition)? ANSWER:

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