pressure difference between a location just infront of the venturi and a location at the throat. (a) Determine the expression of the volumetric flow rate Q as a function of the fluid density p, the pressure difference (Ap = p1 –- p2), and the cross sectional areas A1 and A2 (b) Explain why the pressure difference is taken between 1 and 2, rather than between 2 and 3.Hint:think about the assumptions used to derive the formula for Q.
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