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Tuesday, September 18, 2012

Bernoulli demonstration- Blow the ping pong ball

Use a hair dryer and a simple ping pong ball and you can make a simple but great Bernoulli Principle demonstration- check it out here.
Today we will see the same Bernoulli Principle working in a different way


What we need:
  • ping pong ball,
  • plastic soda bottle, funnel,
  • scissors.
How to:
  1. Cut the top of the bottle, the rounded section, just like shown in picture;
  2. Place the ping pong inside;
  3. Fill your lungs with air;
  4. Blow in the bottleneck, as many times as you want.
What happens?
Nothing! The ball stays in the plastic bottle section.

Why? 
The air you introduce in the plastic "cup" make its way leaning against the walls of the ball, as shown in the picture, causing it to rotate instead of rising.

Of course it is possible to make the ball "fly" but no lungs are able to do it.
See the video:



Et voil√°!
Your Lungs can't do it!
Enjoy!

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