(a) Calculate time required for a virus particle that is 50 nm (50x10 -9 m) in diameter with a density of 1.03 g cm -3 suspended in water with a density of 1.0 g cm -3 to settle out of a water column...

(a) Calculate time required for a virus particle that is 50 nm (50x10^-9
m) in diameter with a density of 1.03 g cm^-3
suspended in water with a density of 1.0 g cm^-3
to settle out of a water column that is 3 m deep. Assume the dynamic viscosity is 1x10^-3
kg m^-1
s^-1. (b) What is the time required if the virus particle was attached to an Al(OH)³
floc that is 0.1 mm in diameter with a density of 2.0 g cm^-3? (Ignore contribution of virus particle to diameter and density of the floc.)