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A simple machine is a mechanical device that changes the direction or magnitude of a force. [1] In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. [2] Usually the term refers to the six classical simple machines that were defined by Renaissance scientists: [3] [4 ...
The hand axe is the first example of a wedge, the oldest of the six classic simple machines, from which most machines are based. The second oldest simple machine was the inclined plane (ramp), [6] which has been used since prehistoric times to move heavy objects. [7] [8] The other four simple machines were invented in the ancient Near East. [9]
Word or phrase Original / literal use Metonymic use Armonk: Armonk, New York, where the headquarters of IBM is located IBM [56] Bay Street: A street in downtown Toronto The Canadian financial sector, since the Toronto Stock Exchange, and the headquarters of the five major Canadian banks, are located there [57] Beacon Hill: A neighborhood in Boston
العربية; Aragonés; Azərbaycanca; বাংলা; Беларуская (тарашкевіца) Català; Čeština; Cymraeg; Dansk; Deutsch; Español; Esperanto
A Rube Goldberg machine, named after American cartoonist Rube Goldberg, is a chain reaction–type machine or contraption intentionally designed to perform a simple task in an indirect and (impractically) overly complicated way. Usually, these machines consist of a series of simple unrelated devices; the action of each triggers the initiation ...
The screw, the last of the simple machines to be invented, [9] first appeared in Mesopotamia during the Neo-Assyrian period (911-609) BC. [7] The Egyptian pyramids were built using three of the six simple machines, the inclined plane, the wedge, and the lever, to create structures like the Great Pyramid of Giza. [10]
Another viral trend—mouth-taping—promises to eliminate snoring, yet there is not much evidence that could confirm that, and this method can be very dangerous for people with sleep apnea, of ...
The wheel and axle is a simple machine, consisting of a wheel attached to a smaller axle so that these two parts rotate together, in which a force is transferred from one to the other. The wheel and axle can be viewed as a version of the Lever , with a drive force applied tangentially to the perimeter of the wheel, and a load force applied to ...