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Project title How to suspend a ball in a stream of air (The Bernoulli principle)
Difficulty Level Elementary school
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Description
A ball stably levitated on an invisible stream of air is a dramatic sight. When you try to pull the ball out of the airstream, you can feel a force pulling it back in. You can alsofeel that the airstream is being deflected by the ball. This Snack shows one of the forces that give airplanes lift.  
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