2C20.10 • Bernoulli Force: Bernoulli Tubes

Location: Cabinet 2

Photo shows the demonstration used at the University of Texas at Austin

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Instructions / Notes:

• Turn on the air valve under the bench.

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Concepts Conveyed:

• Air passes through wide (outer) and then narrow (inner) pieces of the top of the glass tube. At the narrower piece, the air flows at a higher velocity than the wider pieces.
• Bernoulli's Principle: the higher the velocity, the lower the pressure.
• This can be seen by the column of water in the middle rising.

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Demo Staff Instructions:

• Connect the demonstration to an air valve under the lecture bench.

Last updated on March 13, 2025