A gear close gearA gear is a mechanical part with teeth that interlock with another gear or belt to transfer motion and power while changing speed, or direction in a mechanical system. is a special ...

One common misconception is that belts will slip more frequently on composite pulleys than on metal pulleys. Not so! The wedging action of V-belts is so efficient that slip should never be an issue; ...

A new study reinterprets the chambers and passageways of the Pyramid of Khufu not as tombs, but as parts of a gigantic construction machine, solving mysteries that have persisted for millennia. For ...