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  2. Power plant efficiency - Wikipedia

    en.wikipedia.org/wiki/Power_plant_efficiency

    To express the efficiency of a generator or power plant as a percentage, invert the value if dimensionless notation or same unit are used. For example: A heat rate value of 5 gives an efficiency factor of 20%. A heat rate value of 2 kWh/kWh gives an efficiency factor of 50%. A heat rate value of 4 MJ/MJ gives an efficiency factor of 25%.

  3. Rolling code - Wikipedia

    en.wikipedia.org/wiki/Rolling_code

    Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow. An attacker with an appropriate receiver could discover the code word and use it to gain access sometime later. More sophisticated remote control systems use a rolling code (or hopping code) that changes for every use.

  4. Wind turbine - Wikipedia

    en.wikipedia.org/wiki/Wind_turbine

    Thorntonbank Wind Farm, using 5 MW turbines REpower 5M in the North Sea off the coast of Belgium A wind turbine is a device that converts the kinetic energy of wind into electrical energy . As of 2020 [update] , hundreds of thousands of large turbines , in installations known as wind farms , were generating over 650 gigawatts of power, with 60 ...

  5. Median lethal dose - Wikipedia

    en.wikipedia.org/wiki/Median_lethal_dose

    In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.

  6. Free-piston linear generator - Wikipedia

    en.wikipedia.org/wiki/Free-piston_linear_generator

    The free-piston engine linear generators can be divided in 3 subsystems: [1] [2] One (or more) reaction section with a single or two opposite pistons; One (or more) linear electric generator, which is composed of a static part (the stator) and a moving part (the magnets) connected to the connection rod.

  7. Tire code - Wikipedia

    en.wikipedia.org/wiki/Tire_code

    The DOT code [1] is an alphanumeric character sequence molded into the sidewall of the tire and allows the identification of the tire and its age. The code is mandated by the U.S. Department of Transportation [2] but is used worldwide. [3]

  8. Mark Zuckerberg - Wikipedia

    en.wikipedia.org/wiki/Mark_Zuckerberg

    Mark Elliot Zuckerberg (/ ˈ z ʌ k ər b ɜːr ɡ /; born May 14, 1984) is an American businessman.He co-founded the social media service Facebook and its parent company Meta Platforms (formerly Facebook, Inc.), of which he is chairman, chief executive officer and controlling shareholder.

  9. Title 50 of the United States Code - Wikipedia

    en.wikipedia.org/wiki/Title_50_of_the_United...

    Title 50 of the United States Code outlines the role of War and National Defense in the United States Code. Chapter 1: Council of National Defense; Chapter 2: Board of Ordnance and Fortification (repealed) Chapter 3: Alien Enemies; Chapter 4: Espionage (repealed/transferred)

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