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A suspension of a spherical particle of 0.1mm diameter was allowed to settle in a column of 50 cm length. The density difference between the

  1. A suspension of a spherical particle of 0.1mm diameter was allowed to settle in a column of 50 cm length. The density difference between the solid particle and the liquid is 0.05 g/cm3 and the viscosity of the fluid was 1.1 cP.
  1. Calculate the settling time if the particles reach their terminal velocity almost instantaneously
  2. Calculate the settling time in a centrifuge rotating at 400 rpm and if the distance between the axis of rotation and the bottom of the centrifuge was 12 cm and the distance between the axis and liquid surface was 3 cm.

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