← Back to videosPlay videoWatch on YouTube ↗ 
What happens to these balloons when you open the valve?
Veritasium · Published on September 24, 2026
Loved this video? Share it!
Send it to someone who'll love it, or post it on your networks.
Description
Take a balloon and fill it with lots of air. Take another one and fill it with less air. Now connect the two via a valve. What do you think will happen when you open the valve?
See also
When you lose weight where does it go?
Veritasium · Science
The Absurd Engineering Behind the Internet
Veritasium · Science
What is edge dislocation?
Veritasium · Science
How Dangerous Are Non-Stick Pans?
Veritasium · Science
We're trying something new...
Veritasium · Science
The Insane Real Engineering of the Nazi Enigma Machine
Veritasium · Science