Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) ?

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The critical speed of a trommel (N) is related to its dia D. as _____________________?

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Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the____________________?

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What is the reduction ratio in a fine crushing operation having following feed and product sizes ?

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