Chapter 10

Chapter 10

1. pressure and density

   • P=F/A
     • 1 Pa = 1 N/m2
     • Patm= 1.01 x 10 e 5 pa
   • density= M/V
     • SI units: kg/ m3
     • gases are COMPRESSIBLE, liquids are NOT COMPRESSIBLE
   • U-tubes can be used to measure the density of a liquid and pressure differences

2. Effects of gravity

   • pressure always increases as one goes deeper into a fluid

3. Buoyancy and Archimede's Principles

   • the minimum force required to lift a submerged object is apparent weight

4. Pascal's Principle

   • can apply to liquids or gases
   • the gas must be held in a closed container and be in static equilibrium
   • a fluid that satisfies the four assumptions is called ideal fluid
     • the fluid density is constant
     • the flow is steady
     • there is no friction--No Viscosity
     • there are no complex flow patterns such as turbulence

5. Continuity and Bernoulli's Equation

   • flow rate is area and speed
     • SI units: m3/s
   • kinetic and potential energy
   • there are two different pressure terms (1) difference in air speed and (2) difference in height (bottom and top)

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