Spherical Particles of Density 3

Multiple Choice

Spherical particles of density 3.0 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) 2.6 × 10−⁶ m
D) 5.6 × 10−⁶ m