Watch this fascinating demonstration of air pressure at work. Notice how the egg vibrates as the heated air escapes around it, and how it gets smoothly pushed into the bottle by atmospheric pressure.

What happens to something airtight when the air around it changes? Find out by making a pressure bottle and squishing some foamy materials. Download the Squish Bottle PDF (375 Kb). Adobe Acrobat ...

The EZ-Launch bottle rocket launcher has an internal spring loaded release mechanism. that allows the user to lock the 2 liter bottle in place during the fill up phase and release the bottle with ...