Archimedes' Screw, a device used to raise water from one level to another. An Archimedes' screw consists of a helix, or spiral, fitted inside a cylinder that is open at both ends. In use, the lower end of the device is placed under water at a slant and a handle, attached to the helix, is turned. As the helix revolves, small amounts of water are slowly raised in wells formed by the side of the cylinder and the surfaces of the helix. The Archimedes' screw was developed in ancient Egypt and, it is believed, improved by Archimedes (287?-212 B.C.); it is still used occasionally in the Middle East. The device can also be used to lift loose materials, such as grains.
You Might Also Like
Want to learn about the Large Hadron Collider? Do you know which item of clothing was named after an event in nuclear physics? Take the quiz, and the gaps in your knowledge will get smaller, and smaller. And smaller. And smaller…
When physicists want accelerator particles, they head to OK Quark, answer questions about what they're looking for, and hope for a match. Nah, wait … that's not it at all.