Pythagoras Cup (Greedy Cup) filled with Mercury

TL;DR

Ancient Pythagoras Cup drains excess liquid through clever design.

Transcript

One of my co-workers went to a conference in Greece, and came back with a present, of something which is very old, from 400 years B.C. or even earlier, but I'd never seen before. It's called the Pythagoras Cup and it has this strange bit sticking up in the middle. And the story is that this cup was invented by Pythagoras. The one that worked on rig... Read More

Key Insights

• ❓ The Pythagoras Cup, or Greedy Cup, is an ancient invention by Pythagoras.
• 🫗 It functions through a clever siphoning mechanism when liquid exceeds a certain level.
• 💘 The cup demonstrates principles of density and siphoning with water and mercury experiments.
• 👻 Mixing mercury and water in the cup allows for filling without siphoning due to differing densities.
• 💘 Pythagoras' students could have outsmarted the cup by using mercury but at a risk of poisoning.
• 💘 The cup showcases the effects of different densities on liquid behavior.
• 💦 The experimental combination of mercury and water yields interesting visual patterns.

Questions & Answers

Q: What is the Pythagoras Cup and how does it work?

The Pythagoras Cup, also known as the Greedy Cup, is an ancient vessel designed by the mathematician Pythagoras. It operates on the principle of siphoning, draining all liquid once over a certain level.

Q: Why does the Pythagoras Cup work differently with water and mercury?

The Pythagoras Cup behaves differently with water and mercury due to their density and ability to wet glass. Water adheres to glass, causing a dribbling effect, while mercury, being denser, flows straight down.

Q: What happens when the Pythagoras Cup is filled with a combination of mercury and water?

Filling the Pythagoras Cup with a mix of mercury and water allows it to be filled to the brim without siphoning. The varying densities of the liquids affect the cup's functionality.

Q: What would have happened if Pythagoras' students had filled the cup with mercury and water?

If Pythagoras' students had filled the cup with mercury and water, they could have filled it to the top without siphoning. However, this would have posed a risk of poisoning due to the mercury content.

Summary & Key Takeaways

• Pythagoras Cup, a 400-year-old invention by Pythagoras, siphons liquid when filled above a certain level.

• Demonstrated with water and mercury, the cup showcases density and siphoning principles.

• Filling the cup with a combination of mercury and water reveals an interesting outcome.