319. Calculate the sedimentation rate in units (distance/hour) of spherical colloidal particles with a density of 1.50 g/cm3 in the Earth's gravity field. The dispersion medium is water at 20 °C (density 1.00 g/cm3, viscosity 1.00 mPa*s). Make calculations for particle diameter a) 1 nm, b) 1 µm.

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