Week 1: Fluids
Chapter 15
Facts you may need for the Quiz:
Ambient air pressure is about 105Pa or about 15psi
Density of water is about 1g/cm3=1000kg/m3
Density of air is about 1.2kg/m3.
Equations in review and summary of Ch. 15.
Concept-tests:
1.1-Hydraulic
Lever
1.2-Dropped Bucket
with Hole
1.3-Lead & Styrofoam--water level on
Styro
1.4-Lead & Styrofoam--water level in
container
1.5-Cups w/ & w/o ice
1.6-Syphon
Other concept tests:
1.A-Velocity in clogged artery
1.B-Pressure in clogged artery
Answers to Concept Tests
Demos:
Crush the can--demonstrated atomospheric pressure.
Cartesian Diver--demonstrated transmission of pressure through fluid.
LEAKING BOTTLE--demonstrated that water will not leak out of a sealed container with a small
hole.
EGG IN WATER/SALT-WATER--demonstrated that the buoyant force depends upon the density
of the fluid. The egg sinks in water, but floats in more dense salt water.
FLOATING BALL IN AIR STREAM--demonstrated lift by having high velocity air above the ball
Venturi
Tube--demonstrated different pressure at different velocity.
Links:
Fluid Flow
Physics of Tennis--aerodynamics (fluid flow of air)
applied to sports.