Spherical Particles of Density 2

question 80

Multiple Choice

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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