Mechanical Operations
Equivalent diameter of a particle is the diameter of the sphere having the same

None of these
Volume as the particle
Ratio of surface to volume as the actual volume
Ratio of volume to surface as the particle

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Mechanical Operations
During agitation of liquids, the

Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller
All of these
Froude number is independent for the curves between power number and Reynolds number in baffled system
Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number

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