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Derive by the method of dimensions, an e...

Derive by the method of dimensions, an expression for the volume of a liquid flowing out per second through a narrow pipe. Asssume that the rate of flow of liwquid depends on
(i) the coeffeicient of viscosity `eta` of the liquid
(ii) the radius 'r' of the pipe and
(iii) the pressure gradient `(P)/(l)` along the pipte. Take `K=(pi)/(8)`.

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