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2. Show that the power P developed in a water turbine can be expressed as: P = pND5 pDN ND gH B where D

2. Show that the power P developed in a water turbine can be expressed as: P = pND5 pDN ND gH B where D and B are the diameter and width of the runner, N is the speed in revolutions per minutes, H is the operating head, and p are respectively the coefficient of dynamic viscosity and mass density of the liquid, g is the gravitational acceleration. (10)

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