30. Solving a chemistry problem

6. Calculate the mean square shift in 10 s, the velocity U and the sedimentation constant S of spherical particles of iron (III) hydroxide in water, if the particle radii r1 = 5*10-5 m (coarse-dispersed system) and r2 = 5*10-8 m (colloidal system), temperature T = 293 K, η0 = 1*10-3 Pa*s, ρ = 8*103 kg/m3, ρ0 = 1*103 kg/m3. Which of the dispersed systems has greater sedimentation stability?