A mixture of silica (B) and galena (A) solid particles having a size range 1.27 x 10-2 mm to 5.08 x 10-2 mm is to be separated by hydraulic classification using free settling conditions in water at 293.2 K. The specific gravity of silica is 2.65 and that of galena is 7.5. Calculate the size range of the various fractions obtained in the settling. If the settling is in the laminar region, the drag coefficients will be reasonably close to that for spheres. Calculate the size range of the various fractions obtained based on free settling conditions. Determine the value of the largest Reynolds number.

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