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Problem 3.25 - Problem 3.25[Difficulty 2 SGoil = 0.827 from...

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Problem 3.25 [Difficulty: 2] Given: Two fluid manometer, Meriam red oil is the second fluid SG oil 0.827 = from Table A.1 Find: The amplification factor which will be seen in this demonstrator Solution: We will apply the hydrostatics equations to this system. Governing Equations: dp dh ρ g = (Hydrostatic Pressure - h is positive downwards) ρ SG ρ water = (Definition of Specific Gravity) Assumptions: (1) Static liquid (2) Incompressible liquid a l h A Δ h h B b Integrating the hydrostatic pressure equation we get: pp o ρ g h + = For the left leg of the manometer: p a p atm ρ water g h A + = p b p a ρ water g l = p atm ρ water g
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