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  2. Structural channel - Wikipedia

    en.wikipedia.org/wiki/Structural_channel

    The structural channel is not used as much in construction as symmetrical beams, in part because its bending axis is not centered on the width of the flanges. If a load is applied equally across its top, the beam will tend to twist away from the web. This may not be a weak point or problem for a particular design, but is a factor to be ...

  3. Nanochannel glass materials - Wikipedia

    en.wikipedia.org/wiki/Nanochannel_glass_materials

    Channel dimensions are controllable from micrometers to tens of nanometers, while retaining excellent channel uniformity. Exact replicas of the channel glass can be made from a variety of materials. This is a low cost method for creating identical structures with nanoscale features in large numbers.

  4. Characteristic length - Wikipedia

    en.wikipedia.org/wiki/Characteristic_length

    In physics, a characteristic length is an important dimension that defines the scale of a physical system. Often, such a length is used as an input to a formula in order to predict some characteristics of the system, and it is usually required by the construction of a dimensionless quantity, in the general framework of dimensional analysis and in particular applications such as fluid mechanics.

  5. Rack unit - Wikipedia

    en.wikipedia.org/wiki/Rack_unit

    Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...

  6. Chézy formula - Wikipedia

    en.wikipedia.org/wiki/Chézy_formula

    The Chézy Formula is a semi-empirical resistance equation [1] [2] which estimates mean flow velocity in open channel conduits. [3] The relationship was conceptualized and developed in 1768 by French physicist and engineer Antoine de Chézy (1718–1798) while designing Paris's water canal system.

  7. 2 Teenagers Dead and Sister in Critical Condition after Car ...

    www.aol.com/2-teenagers-dead-sister-critical...

    Giselle Smith and Semaj Morris, 17, were both killed on Wednesday, Dec. 11, with Smith's sister Paris Kiper in critical condition

  8. Assad makes first public statement after Syria ouster. What ...

    www.aol.com/assad-makes-first-public-statement...

    Syrian leader Bashar Assad issued what appeared to be his first public statement since he was ousted and fled with his family to Russia more than a week ago.

  9. Wait, exactly how many people work for the federal government?

    www.aol.com/news/wait-exactly-many-people...

    A version of this story appeared in CNN’s What Matters newsletter. To get it in your inbox, sign up for free here.. The US grew a lot in the past 40 years.