2B30.45 - Water Column - Water Barometer

Code Number:
Demo Title:
Water Column - Water Barometer
Air Pressure
Area of Study:
Heat & Fluids
Large Water Columns, Pyrex Pan, and Laminated Note Card.

Video Credit: Jonathan M. Sullivan-Wood

Fill the glass or Plexiglas column completely with water.  Put about 2 inches of water into the Pyrex pan.  Place the laminated note card over the mouth of the column and invert this into the Pyrex pan.  The water in the column should not drain into the pan.

NOTE: Do Not remove the note card from the mouth of the column until it is completely under water in the pan.

Fill the soda bottle with water holding your finger over the hole in the side.  Screw the cap on tightly and remove your finger showing that only several drips exit from the hole.  Loosen the cap and the observe the water stream.

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