A centrifuge with a diameter of 20 in. operates at a speed of 1800 rpm. If there is a water layer 3 in. thick on the centrifuge wall, what is the pressure exerted on the wall? Calculate the range of...

A centrifuge with a diameter of 20 in. operates at a speed of 1800 rpm. If there is a water layer 3 in. thick on the centrifuge wall, what is the pressure exerted on the wall?

Calculate the range of water velocities that will fluidize a bed of glass spheres (SG = 2:1) if the sphere diameter is: (a) 2 mm, (b) 1 mm, (c) 0.1 mm.