MIKE MOSS SAYS: Eugene, There are three primary types of pressure readings used at weather reporting stations. The pressure exerted by the weight of the atmosphere at and above the location of the ...

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.

To learn how I made the vacuum pump used to operate this cannon, take a look at this video: • How to Make a Vacuum Pump A vacuum cannon is an interesting physics demonstration that shows how much ...