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  2. Water wheel - Wikipedia

    en.wikipedia.org/wiki/Water_wheel

    Water wheel. A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a wheel (usually constructed from wood or metal), with a number of blades or buckets arranged on the outside rim forming the driving car.

  3. Wikipedia:Wiki Game - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Wiki_Game

    Wiki Game. The Wiki Game, also known as the Wikipedia race, Wikirace, Wikispeedia, WikiLadders, WikiClick, or WikiWhack, is a race between any number of participants, using wikilinks to travel from one Wikipedia page to another. The first person to reach the destination page, or the person that reaches the destination using the fewest links ...

  4. Francis turbine - Wikipedia

    en.wikipedia.org/wiki/Francis_turbine

    It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. [ 1] The process of arriving at the modern Francis runner design took from 1848 to approximately 1920. [ 1] It became known as the Francis turbine around 1920 ...

  5. Water turbine - Wikipedia

    en.wikipedia.org/wiki/Water_turbine

    A water turbine is a rotary machine that converts kinetic energy and potential energy of water into mechanical work. Water turbines were developed in the 19th century and were widely used for industrial power prior to electrical grids. Now, they are mostly used for electric power generation.

  6. Wheel - Wikipedia

    en.wikipedia.org/wiki/Wheel

    The wheel is one of the key components of the wheel and axle which is one of the six simple machines. Wheels, in conjunction with axles, allow heavy objects to be moved easily facilitating movement or transportation while supporting a load, or performing labor in machines. Wheels are also used for other purposes, such as a ship's wheel ...

  7. History of perpetual motion machines - Wikipedia

    en.wikipedia.org/wiki/History_of_perpetual...

    The history of perpetual motion machines dates at least back to the Middle Ages. For millennia, it was not clear whether perpetual motion devices were possible or not, but modern theories of thermodynamics have shown that they are impossible. Despite this, many attempts have been made to construct such machines, continuing into modern times.

  8. Pelton wheel - Wikipedia

    en.wikipedia.org/wiki/Pelton_wheel

    The Pelton wheel or Pelton Turbine is an impulse -type water turbine invented by American inventor Lester Allan Pelton in the 1870s. [1] [2] The Pelton wheel extracts energy from the impulse of moving water, as opposed to water's dead weight like the traditional overshot water wheel. Many earlier variations of impulse turbines existed, but they ...

  9. Wikipedia:Random - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Random

    On Wikipedia and other sites running on MediaWiki, Special:Randomcan be used to access a random article in the main namespace; this feature is useful as a tool to generate a random article. Depending on your browser, it's also possible to load a random page using a keyboard shortcut(in Firefox, Edge, and Chrome Alt-Shift+X).