How does a Phytagoras Cup work?
In: Physics
When the liquid in a Pythagoras cup reaches high enough height to fall out the center, it creates a flow. As it falls down, it would create suction behind itself to prevent a vacuum forming. Because the channel is so narrow, that pulls more liquid from the bottom of the cup up and into the channel. This process continues until most of the liquid has poured out and air fills into the channel.
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