Add a Media Piece
default edit
Back to the Gallery
This will be replaced by the player.

Title: Water Seeking Level

Description: Despite moving the ends of the tube up and down, the water columns inside the tube remain at the same height. Since both open ends of the tube experience the same atmospheric pressure, the change in height of the tubing does not affect the height of the water columns. If we put our thumb over the end of the tubing, the volume of air trapped there remains constant. If we raise and lower that log of the tube, the pressure will change and the water levels will move up and down.

Credits: Reimi Yonekura, Rich Wlezien, Erich Tisch, NSF


Web Page:

Contributed By: Erich Tisch

The eFluids editor for videos is G. M. "Bud" Homsy (
and for images is Jean Hertzberg (
Please contact them if you have any problems, questions, or concerns related to the galley or videos and images.
© Copyright on the videos is held by the contributors.
Apart from Fair Use, permission must be sought for any other purpose.