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  2. Bosch (company) - Wikipedia

    en.wikipedia.org/wiki/Bosch_(company)

    In 1901, Bosch opened its first factory in Stuttgart. In 1906, the company produced its 100,000th magneto. In the same year, Bosch introduced the eight-hour day for workers. In 1910, the Feuerbach plant was founded and built close to Stuttgart. In this factory, Bosch started to produce generators and headlights "Bosch-Light" in 1914.

  3. Lawn mower - Wikipedia

    en.wikipedia.org/wiki/Lawn_mower

    A residential riding or "ride-on" mower A battery-powered robotic lawn mower A commercial zero-turn mower. A lawn mower (also known as a grass cutter or simply mower, also often spelled lawnmower) is a device utilizing one or more revolving blades (or a reel) to cut a grass surface to an even height. The height of the cut grass may be fixed by ...

  4. Fleming's right-hand rule - Wikipedia

    en.wikipedia.org/wiki/Fleming's_right-hand_rule

    If the motor is then disconnected from the fully charged battery, and connected instead to a completely flat battery, the vehicle will decelerate. The motor will act as a generator and convert the vehicle's kinetic energy back to electrical energy, which is then stored in the battery. Since neither the direction of motion nor the direction of ...

  5. Phone connector (audio) - Wikipedia

    en.wikipedia.org/wiki/Phone_connector_(audio)

    The internal battery has its negative terminal wired to the sleeve contact of the jack. When the user plugs in a two-conductor (mono) plug, the resulting short circuit between the sleeve and ring connects an internal battery to the unit's circuitry, ensuring that it powers up or down automatically whenever a signal lead is inserted or removed.

  6. p–n junction - Wikipedia

    en.wikipedia.org/wiki/P–n_junction

    The invention of the p–n junction is usually attributed to American physicist Russell Ohl of Bell Laboratories in 1939. [1] Two years later (1941), Vadim Lashkaryov reported discovery of p–n junctions in Cu 2 O and silver sulphide photocells and selenium rectifiers. [2]

  7. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    In chemistry, pH (/ p iː ˈ eɪ tʃ / pee-AYCH), also referred to as acidity or basicity, historically denotes "potential of hydrogen" (or "power of hydrogen"). [1] It is a logarithmic scale used to specify the acidity or basicity of aqueous solutions.