Pythagoras Cup of Justice Pythagorean Theorem Fair Mug Blue Cobalt

Description: Pythagoras Cup of Justice Pythagorean Theorem Fair Mug Blue Cobalt Usable Height: 4.3 inches (11 cm)Diameter: 4 inches (10 cm)Weight: 0.53 lbs (240 gr) A Pythagorean cup (also known as a Pythagoras cup, Greedy Cup, Cup of Justice, Tantalus cup or i koupa tis dikaiosynis) is a practical joke device in a form of a drinking cup, credited to Pythagoras of Samos. When it is filled beyond a certain point, a siphoning effect causes the cup to drain its entire contents through the base. A Pythagorean cup looks like a normal drinking cup, except that the bowl has a central column in it, giving it a shape like a Bundt pan. The central column of the bowl is positioned directly over the stem of the cup and over a hole at the bottom of the stem. A small open pipe runs from this hole almost to the top of the central column, where there is an open chamber. The chamber is connected by a second pipe to the bottom of the central column, where a hole in the column exposes the pipe to (the contents of) the bowl of the cup. When the cup is filled, liquid rises through the second pipe up to the chamber at the top of the central column, following Pascal's principle of communicating vessels. As long as the level of the liquid does not rise beyond the level of the chamber, the cup functions as normal. If the level rises further, however, the liquid spills through the chamber into the first pipe and out of the bottom. Gravity then creates a siphon through the central column, causing the entire contents of the cup to be emptied through the hole at the bottom of the stem. Most modern toilets operate on the same principle: when the water level in the bowl rises high enough, a siphon is created, emptying the bowl. Terms of Sale Return PolicyCustomers must inspect item(s) and notify us within 14 days of any problems.If you have a problem with your item please contact us before leaving feedback.Returns are accepted, the buyer must pay my initial shipping cost and also pay for the return shipping cost. Items must be returned in the exact same condition that they were shipped out in. I don't do returns based on size/colour and failure to read my item description and review pictures. WarrantyNo manufacturer's warranty should be expected unless stated in description Terms & Conditions By paying for this item you acknowledge you reviewed all the pictures/description are satisfied with the condition and any other feature the item has, if you have any questions about the item, size color ext, message me prior to purchasing. Only what is in the pictures is included, nothing else, don't assume anything. If cables, accessories or anything else isn't pictured then there not included. If you are dissatisfied for any reason, please don't be quick to leave negative/neutral feedback I'll do my best to work things out if there is a problem with your purchase. If you are satisfied with the product and service, please leave positive feedback. Thanks for looking, check out my other eBay listings. Be sure to click Follow This Seller if your interested in more items like this. Our shipments are processed within 1 business day of cleared payment. (excluding holidays) Thanks for looking!

Price: 41.9 USD

Location: Athens

End Time: 2024-12-11T09:04:13.000Z

Shipping Cost: 0 USD