2B30.45 Card and Glass
Concepts
Air pressure
Overview
The card is placed on the glass of water and they are turned upside down. The water stays in the glass.
Details
Equipment
- [1] Playing card
- [1] Glass
- [1] Tray
- Coloured water
Script
- Fill the glass with coloured water.
- Place the card on the glass.
- Keeping the card in place, slowly turn the glass upside down over the tray in case of spillage.
- Release the card. The water will stay in the glass.
Additional Resources
References
- PIRA 2B30.45
- W. Thumm, "Questions Some Students Ask... A Question of Air Pressure." TPT 11, 242 (1973)
Disclaimer
- Don't attempt this at home!
Last revised
- 2020
Technicals
Related AV
Related demos
If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.