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
  • Colored water

Important Notes

  • This demonstration requires practice in advance

Script

  1. Fill the glass with colored water.
  2. Place the card on the glass.
  3. Keeping the card in place, slowly turn the glass upside down over the tray in case of spillage.
  4. Release the card. The water will stay in the glass.

 

Additional Resources

References

  • PIRA 2B30.45
  • Walter Thumm "A question of air pressure" TPT ?, 242 (April 1973)

Disclaimer

  • Don't attempt this at home!

Last revised

  • 2018

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.