21. Calculate the rate and time of settling of particles of yellow vat pigment in water in a centrifugal field at a centrifuge speed of n=1800 rpm. Pigment density p=1.3*103 kg/m3; water density р01*103 kg/m3; distance from the rotor axis to the sediment; h=0.05 m, viscosity n=1*10-3 Pa*s.

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