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The flow rate Q in an open channel depends on the hydraulic radius R, the cross-sectional area A, the wall roughness height e, gravity g, and the slope S. Is this expression correct?

Use dimensionless analysis to prove the expression. The drag force Fp on a smooth sphere falling in a liquid depends on the sphere speed V, the solid density ps, the liquid density p and viscosity μ, the sphere diameter D, and gravity g. Is this expression correct?

Use dimensionless analysis to prove the expression. O True False

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