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3. The frictional torque T of a disc depends the disc diameter D, rotating speed of N, fluid of viscosity μ and fluid de
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3. The frictional torque T of a disc depends the disc diameter D, rotating speed of N, fluid of viscosity μ and fluid de
3. The frictional torque T of a disc depends the disc diameter D, rotating speed of N, fluid of viscosity μ and fluid density density p. Express T in terms of dimensionless parameters.