Mechanical Operations
__________ is defined as the geometric mean of the relative rejections and the relative recoveries of two minerals.

None of these
Concentration ratio
Selectivity index
Separation efficiency

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Mechanical Operations
Bond crushing law

Calls for relatively less energy for the smaller product particles, than does the Rittinger law
States that the work required for the crushing is proportional to the new surface created
States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product
Is less realistic in estimating the power requirements of commercial crushers

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