====== Vacuum Cannon—Apparatus Under Construction ======

{{ :physicsdemos:thermodynamics_and_fluid_dynamics:thermodynamics:vacuum_cannon.mp4 |}}

A piece of PVC pipe with a ping pong ball inside is sealed at both ends with aluminum foil and evacuated with a vacuum pump. When one of the aluminum foil seals is ruptured, the ping pong ball is fired at very high velocity from the opposite end of the pipe.

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PIRA DCS 2B30.70