Science Bob Pflugfelder
Science Bob: Make a Cartesian Diver!
This site presents a procedure for creating a cartesian diver, a miniature submarine which rises or sinks depending upon the water pressure within a closed bottle. The site also introduces basic concepts of water and air pressure.
TeachEngineering
Teach Engineering: Hovercraft Racers!
Students gain first-hand experience on how friction affects motion. They build a hovercraft using air from a balloon to levitate a craft made from a compact disk (CD), learning that a bed of air under an object significantly reduces the...
Physics Central
Physics Central: Physics in the Kitchen: The Magical Can Crusher
Students will see first hand the force that is created by pressure as a can crushes before their eyes. This demonstration will show students how a can will collapse due to pressure from the air outside pushing against the can's exterior...