146. Solving a chemistry problem

11. Find the sedimentation rate of the particles of the coalin suspension in water at a temperature of T = 288 K. The particle radius r = 2 · 10 -6 m; the density of the coal is
ρ = 2.2 · 10 3 kg / m 3; the water viscosity η = 1.14 · 10 -3 Pa · s.