Introduction Can you think of a way to make water run uphill—without using electricity? The ancient Greeks discovered how to do just this! They developed a device called the Archimedes screw to lift ...

Hydraulic jacks and screw jacks serve the same basic purpose, allowing mechanics to lift and support heavy loads in the shop. That said, there are some pretty major differences in how they work, the ...

Screws may be commonplace, but that doesn't mean they're simple. A screw is any shaft with a corkscrew groove carved around its surface and, regardless of their design, screws are usually used to ...