A settling chamber is used to remove sand and grit from the influent water to a waste water treatment plant .Conditions are:
(a) What is the minimum settling velocity required for a particle to be removed by this settling chamber? Express your answer in units of cm s-1 .
(b) Assume that this or another settling chamber removes all particles having settling velocities greater or equal to 0.04 cm s-1. What is the min-imum particle diameter that would be entirely removed by such a settling chamber? Express your answer in units of µm.