The first person to describe the spiral was the Greek scientist Archimedes (circa 287 BC - 212 BC). The Archimedean spiral is a giant spiral mounted in a wooden cylinder that lifts water from one level to another and irr...
Screws are tools that use the physics and mathematics of an object's beveled circular rotation and friction to gradually fasten mechanical parts. Screws are a common term for fasteners, spoken daily. Screws are indispens...
