Bernoulli's breath test

October 04, 2016

Can you blow this up in one breath?

This experiment is a favourite from Steve Spangler and always good fun.  You can even try it out with diaper Genie bags – just tie one end up!

Test 1:  Blow the bag up like you would a balloon.

Test 2:  Blow the bag up with a gentle breath stream and the opening held out by extending your thumb and pointing fingers.  Keep your lips a few centimetres away from the opening….  Ask a friend to hold the other end so that the windbag is horizontal..

GO!

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