3) Pressure, Fluids, and Gas Law
a) Pressure and Gas Law
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Two Fire Syringes (also listed under Thermodynamics)
A Piston that uses high pressure to ignite tissuepaper
much like a diesel engine works.
Shows dU=dW, if dQ=0
The pressure of a thin wire on an ice cube cuts the
ice.
The ice refreezes after the wire passes.
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3D P,V,T Curves for Water and Carbon Dioxide
Shows triple point, phases, etc..
Two evacuated sphere halves, which are almost impossible
to separate.
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Vapor Pressure Explosion Can
A one-gallon can that has a handle inside a fuel of
dust (cork, flour, etc..) that explodes
when it fills the chamber. The explosion blows the can
lids off.
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Boiling While Cooling Bottle
A flask of water is boiled and the scaled off with a
valve.
When the flask is cooled with water the steam condenses
and drops the pressure to a
Point where boiling can occur.
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Portable Vacuum Pump:
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Crush Can with Vacuum
The vacuum pump or cooling steam can be used.
The balloon gets pulled into the flask as cooling steam
reduces the pressure
Vacuum chamber for all kinds of experiments such as
balloons, marshmallows, shaving
cream, boiling water at room temperature, Etc...
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Vacuum Jar Creation Model (Dewar Bottle Model)
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Absolute Pressure Gauge:
Can be used to estimate absolute zero temperature graphically.
Temperature Vs Pressure
A bottle with a test tube that barely floats inside.
When the bottle is squeezed the "diver" sinks.
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Bicycle Pump
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Simulated Lung
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22.4 Liter Box
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Cloud Bottle
Under relaxation of pressure the dissolved methanol
in a bottle crystals out and gives
Visible clouds.
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Air Pop Gun
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Bicycle Pump Pop Gun
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Large Barometers
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Mercury Barometer
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Large Celsius and Fahrenheit Thermometers
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Celsius, Kelvin and Fahrenheit Comparison Chart
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Simple Colored Water Flask Thermometer
Shows the Basic idea of how to construct a thermometer
and create a scale.
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Windspeed Gauges
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Celsius Sling Psychrometer for relative humidity
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Fahrenheit Sling Psychrometer for relative humidity
b) Fluids
Wood, Aluminum, Lead Cylinders
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Surface Tension Experiments
Soap bubbles, Floating razor blacks, etc...
Two clay masses of equal size, one floats and one sinks.
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Archimedes Flow Fluid Can
A mass lowered into the can and the fluid displaced
is measured for buoyancy force.
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Archimedes Graduated cylinder
A mass displaces fluid and the change in volume is measured
using the cylinder.
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Glass Fluid Level Indicator
A glass tube of different shapes to show fluid level
is the same regardless of the
shape of the container.
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Bernoulli's Pressure Air Speed Experiment
A glass tube that narrows and with fluid shows the relationship
between pressure and
fluid velocity.
To show a shaped surface that provides lift.
A funnel that picks up a Ping-Pong ball even though
air is blowing out of the funnel.
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Floating Bernoulli Beachball, Golf Ball, and Ping-Pong Ball
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Styrofoam Curve Thrower
A sandpaper lined handle that gives a thrown Styrofoam
ball a strong spin and causes
it to curve.
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Bernoulli's Floating Disk
A pair of flat disks where air pressure via Bernoulli's
law holds them together.
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Fluid Pressure with Depth Bottle (and Tank)
Water squirting out drilled holes in a bottle at different
depth shows pressure.
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Large and Small Vortex Generators
Smoke rings show fluid motion across a room and can
blow out a candle at a long
Long distance.
A very Difficult and messy setup for the overhead projector
to demonstrate laminar flow.
Uses fluid pressure on a cross-sectional area to crush
2" by 2" wood block