Crush a steel drum with air pressure
Chief Scientist Carl Nelson demonstrates how to crush a steel 55 gallon drum using only a slight imbalance in air pressure. After heating the air and water vapor inside the drum, it is sealed and then cooled in a tray of ice. As the water vapor condenses and the air cools inside the drum a slight imbalance in air pressure occurs. The drum crushes dramatically. Tony Geftos from 13abc assists in the process.

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