Water Barometer - Can Crusher

Purpose

To illustrate a result of atmospheric pressure.
 

Equipment

Rectangular can with special cap and 15 feet of thick-walled rubber hose, large plastic water reservoir.

 

Suggestions

Requires a high ceiling!
 

Setup Time

5 min.
 

    Images

    i3-12

    Description

    A rectangular can, connected to a long rubber hose, is filled with water from a large reservoir. The can is then raised about 15 feet, keeping the end of the hose in the water reservoir. The pressure differential between the inside and the outside of the can crushes the can as the water runs out in about 30 seconds.