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  2. Centrifugal pump selection and characteristics - Wikipedia

    en.wikipedia.org/wiki/Centrifugal_pump_selection...

    Here and depend on the geometric parameters and the rotational speed of the pump and are assumed to be constant for the purpose of comparison. However, this simple linear relationship undergoes modification on account of various losses and a non-linear, decreasing H − Q {\displaystyle H-Q} relationship is seen in the pump characteristic curve.

  3. Transistor - Wikipedia

    en.wikipedia.org/wiki/Transistor

    A bipolar junction transistor (BJT) has terminals labeled base, collector and emitter. A small current at the base terminal, flowing between the base and the emitter, can control or switch a much larger current between the collector and emitter. A field-effect transistor (FET) has terminals labeled gate, source and drain. A voltage at the gate ...

  4. Talk:Base curve radius - Wikipedia

    en.wikipedia.org/wiki/Talk:Base_curve_radius

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  5. Soil mechanics - Wikipedia

    en.wikipedia.org/wiki/Soil_mechanics

    Gravity on its own may also carry particles down from the top of a mountain to make a pile of soil and boulders at the base; soil deposits transported by gravity are called colluvium. [1] [2] The mechanism of transport also has a major effect on the particle shape. For example, low velocity grinding in a river bed will produce rounded particles.

  6. MOSFET - Wikipedia

    en.wikipedia.org/wiki/MOSFET

    However, with current gate oxides with a thickness of around 1.2 nm (which in silicon is ~5 atoms thick) the quantum mechanical phenomenon of electron tunneling occurs between the gate and channel, leading to increased power consumption. Silicon dioxide has traditionally been used as the gate insulator. Silicon dioxide however has a modest ...

  7. COVID-19 pandemic - Wikipedia

    en.wikipedia.org/wiki/COVID-19_pandemic

    Using such data, estimates of the true number of deaths from COVID-19 worldwide have included a range from 18.2 to 33.5 million (≈27.4 million) by 18 November 2023 by The Economist, [7] [73] as well as over 18.5 million by 1 April 2023 by the Institute for Health Metrics and Evaluation [74] and ≈18.2 million (earlier) deaths between 1 ...

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