3) Pressure, Fluids, and Gas Law

a) Pressure and Gas Law

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.
Shows triple point, phases, etc.. Two evacuated sphere halves, which are almost impossible to separate. 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.
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.
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...
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.
Under relaxation of pressure the dissolved methanol in a bottle crystals out and gives
Visible clouds.
Shows the Basic idea of how to construct a thermometer and create a scale.  
b) Fluids Wood, Aluminum, Lead Cylinders Soap bubbles, Floating razor blacks, etc... Two clay masses of equal size, one floats and one sinks. A mass lowered into the can and the fluid displaced is measured for buoyancy force. A mass displaces fluid and the change in volume is measured using the cylinder. A glass tube of different shapes to show fluid level is the same regardless of the
shape of the container.
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. 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