Mechanical Operations
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is

KW. sec/kg
KWh/sec. kg
Kg/sec
KWh/kg

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Mechanical Operations
Filter aids like asbestos, kieselguhr, diatomaceous earth etc. are used to increase the porosity of the final filter cake & reducing the cake resistance during filtration. Filter aid is

Added to the feed slurry
All of these
Precoated on the filter medium prior to filtration
Separated from the cake by dissolving solids or by burning it off

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