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phy2048 lecture34

# phy2048 lecture34 - 14-1 What Is Physics 14-2 What Is a...

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Unformatted text preview: 14-1 What Is Physics? 14-2 What Is a Fluid?14-3 Density and Pressure14-4 Fluids at Rest14-5 Measuring Pressure14-6 Pascal’s Principle14-7 Archimedes’ Principle14-8 Ideal Fluids in Motion14-9 The Equation of Continuity14-10 Bernoulli’s EquationChapter 14:FluidsChapter 14 Homework5, 6, 9, 12, 16, 25, 26, 28, 30, 32, 35, 37DensityVm∆∆=ρ:DensityMass•SI Unit: kg/m3•Uniform density ρ= m/VAm∆∆=σ:DensityAreaLm∆∆=μ:DensityLinear Water1 000 kg/m3Ice917 kg/m3 Aluminum2 700 kg/m3Cooper8 890 kg/m3Lead11 300 kg/m3Mercury13 600 kg/m3Gold19 300 kg/m3Air1.21 kg/m3Helium0.179 kg/m3 Oxygen1.43 kg/m3PressureAFP∆∆=:Pressure•Scalar, not a vector•SI Unit: Pascal (Pa) 1 Pa = 1 N/m2•Other Units: bar, atm, torr (mmHg)•Atmospheric pressure: 1 atm (atmosphere) = 1.013×105PaUniform force: P = F/ASample Problem 14-1.Living room 3.5 m ×4.2 m ×2.4 m, P= 1.0 atm(a)What is the weight of the air? (420 N)(b) What is the force on top of your head, which we take to have an area of 0.040 m2? (4.0×103N)Pressure in a Static Fluidghpygppρρ=∆∆+=12ghppρ+=Absolute pressureAtmospheric pressureGauge pressureExamples...
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phy2048 lecture34 - 14-1 What Is Physics 14-2 What Is a...

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