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Lecture 7

# Lecture 7 - Physics 040B/001-S-08 Review Pressure Chap...

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April 24, 2008 Physics 40B Lecture 7 1 Physics 040B/001-S-08 Chap. 14:4-5 Bernoulli’s Equation Review 1 Pascal (Pa) = 1 N/m 2 p = p o + ρ gh A body that is partly or entirely submerged in a fluid is “buoyed up” by a force equal in magnitude to the weight of the displaced fluid and directed upward along a line through the center of gravity (mass) of the displaced fluid. Pressure Pressure variation with depth Pascal’s Principle p = F " A = Force Area = Newtons m 2 p = F 1 A 1 = F 2 A 2 " F 2 = A 2 A 1 F 1 Archimedes’s Principle--Buoyant Force

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April 24, 2008 Physics 40B Lecture 7 2 Continuity Equation & Streamline Fluid Flow Steady Laminar Flow-all particles follow smooth “Streamline” path that doesn’t cross other paths Turbulent Flow-not steady Viscosity of Fluid-due to internal friction-neglect Incompressible fluid-density doesn’t change, independent of pressure For Streamline flow of incompressible fluids: A 1 v 1 = A 2 v 2 = volume flow rate (m 3 /s) Volume Flow Rate (m 3 /s) = A v
April 24, 2008

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Lecture 7 - Physics 040B/001-S-08 Review Pressure Chap...

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