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33-fluids III

# 33-fluids III - Phys 211 Chapter 14 Fluids Review Fluid...

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Phys 211 4/17/09 Chapter 14 Fluids

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Review Fluid: Anything that flows / takes the shape of its container. m = ρ V Density: Mass per unit volume Pressure: Force per unit area F = pA The pressure at a point in a fluid in static equilibrium depends on the depth of that point but not on any horizontal dimension of the fluid or its container. At a given level, the pressure is the same in all directions. p = p 0 + ρ gh Pascal’s Principle: A change in the pressure applied to an enclosed incompressible fluid is transmitted undiminished to every portion of the fluid and the walls of its container. Archimedes’ Principle : A body partly or completely submerged is buoyed by a force equal to the weight of the displaced fluid .
Weights Overboard You are in a boat with two large, iron anchors. You don’t need them so you throw them overboard and they sink to the bottom of the pond. What happens to the water level of the pond? 1) it gets higher 2) it gets lower 3) it stays the same Floating: Volume of water=weight of anchors is displaced (requires lots of displaced water!) Sunk: Volume of water=volume of anchors is displaced http://www.ac.wwu.edu/~vawter/PhysicsNet/QTMovies/QT-Mech-Main.html

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