PIRA 2C20.10 Bernoulli Force: Bernoulli Tubes

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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.

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