An aqueous slurry containing particles with SG = 4 and a range of sizes up to 300 m flows upward through a small tube into a larger vertical chamber with a diameter of 10 cm. You want the liquid to...

An aqueous slurry containing particles with SG = 4 and a range of sizes up to 300 m flows upward through a small tube into a larger vertical chamber with a diameter of 10 cm. You want the liquid to carry all of the solids through the small tube, but you want only those particles with diameters less than 20 m to be carried out the top of the larger chamber.

(a) What should the flow rate of the slurry be (in gpm).

(b) What size should the smaller tube be?