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9. Bernoullis equation With a manometer as shown below, we can find an average velocity at a certain position by applying the Bernoulli equation. Suppose that the cross-section area (2) of pipe at point 2 is twice smaller than that (S) at point 1. The density of incompressible flowing fluid and manometer fluid are denoted as p and p, respectively. Neglecting a surface viscous friction between the two points (1 and 2), calculate the average velocity at point 1 when the pressure difference (P-P) is measured. flow

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Given C(dınsthjof flowing fluld) hb Gennoullis equatorn presuYe energy t Kinetrc ene g y Polen hal energy ton Stant from conleg、 16 15

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