4.9. Tube centrifuge. It is desired to process a dilute suspension of yeasts of 10 m in diameter and density of 1.01 g/cm3, with a centrifuge of tubes that operates at 8,000 rpm. The tubes are filled with the suspension until a height of 5 cm. When the centrifuge is running the tubes rotate perpendicularly to the axis and the bottom of the tubes is located 9 cm from the axis. Required: Estimate the time to settle half the particles if these are assumed to be uniformly distributed in the suspension. The properties of the liquid can be taken as those of water.