Spherical particles of density 2.0 g/cm³ are shaken in a container of water (viscosity = 1.0 ´ 10^-3 N*s/m³).The water is 8.0 cm deep and is allowed to stand for 30 minutes.What is the radius of the largest particles still in suspension at that time? A)4.5 ´ 10^-6 m B)9.0 ´ 10^-6 m C)2.3 ´ 10^-6 m D)5.6 ´ 10^-6 m

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Quizplus · Accepted Answer

The terminal velocity of a particle in a fluid is given by Stokes' Law: v = (2/9) * (r^2 * (ρ_p - ρ_f) * g) / η. Solving for r with given values and time, the largest radius is 4.5 x 10^-6 m.

Spherical Particles of Density 2