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The Civilized Glass by Mr. Sci Science Toy Factory | The Civilized Glass: http://physicstoys.blogspot.com/p/physics-toy-store.html A most elegant version of the famous Pythagorean cup. Functions as a... | By Physicsfun | Facebook
The Pythagorean "Greedy" Cup Explained: When Fluid Dynamics Meet Practical Jokes
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Pythagoras created this drinking cup as a practical joke. When it is filled beyond a certain point, a siphoning effect causes the cup to drain its entire contents through the base. :