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  2. Darcy friction factor formulae - Wikipedia

    en.wikipedia.org/wiki/Darcy_friction_factor_formulae

    In this article, the following conventions and definitions are to be understood: The Reynolds number Re is taken to be Re = V D / ν, where V is the mean velocity of fluid flow, D is the pipe diameter, and where ν is the kinematic viscosity μ / ρ, with μ the fluid's Dynamic viscosity, and ρ the fluid's density.

  3. Carry-select adder - Wikipedia

    en.wikipedia.org/wiki/Carry-select_adder

    A 16-bit carry-select adder with variable size can be similarly created. Here we show an adder with block sizes of 2-2-3-4-5, this is the special type of Variable-sized carry select adder, called as square root carry select adder. [2] This break-up is ideal when the full-adder delay is equal to the MUX delay, which is unlikely.

  4. Hazen–Williams equation - Wikipedia

    en.wikipedia.org/wiki/Hazen–Williams_equation

    Q = volumetric flow rate, m 3 /s (cubic meters per second) C = pipe roughness coefficient; d = inside pipe diameter, m (meters) Note: pressure drop can be computed from head loss as h f × the unit weight of water (e.g., 9810 N/m 3 at 4 deg C)

  5. Cross-linked polyethylene - Wikipedia

    en.wikipedia.org/wiki/Cross-linked_polyethylene

    A cross-linked polyethylene (PEX) pipe. Cross-linked polyethylene, commonly abbreviated PEX, XPE or XLPE, is a form of polyethylene with cross-links.It is used predominantly in building services pipework systems, hydronic radiant heating and cooling systems, domestic water piping, insulation for high tension (high voltage) electrical cables, and baby play mats.

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  7. 24-cell honeycomb - Wikipedia

    en.wikipedia.org/wiki/24-cell_honeycomb

    In four-dimensional Euclidean geometry, the 24-cell honeycomb, or icositetrachoric honeycomb is a regular space-filling tessellation (or honeycomb) of 4-dimensional Euclidean space by regular 24-cells. It can be represented by Schläfli symbol {3,4,3,3}. The dual tessellation by regular 16-cell honeycomb has Schläfli symbol {3

  8. Hirose U.FL - Wikipedia

    en.wikipedia.org/wiki/Hirose_U.FL

    Hirose U.FL, I-PEX MHF I [a], AMC [2] or UMCC [b] is a miniature RF connector for high-frequency signals up to 6 GHz manufactured by Hirose Electric Group, [3] I-PEX, [4] and others. U.FL connectors are commonly used in applications where space is of critical concern, such as in smartphones and laptop Wi-Fi cards.

  9. Head of elite D.C. preschool arrested after allegedly ...

    www.aol.com/head-elite-d-c-preschool-192229173.html

    The British-born director of a tony Washington, D.C., preschool was arrested Tuesday morning on charges that he solicited graphic sex abuse footage of a 9-year-old boy, via the child’s father ...

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