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  2. Armstrong limit - Wikipedia

    en.wikipedia.org/wiki/Armstrong_limit

    The Armstrong limit or Armstrong's line is a measure of altitude above which atmospheric pressure is sufficiently low that water boils at the normal temperature of the human body. Exposure to pressure below this limit results in a rapid loss of consciousness, followed by a series of changes to cardiovascular and neurological functions, and ...

  3. Ceiling (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Ceiling_(aeronautics)

    The service ceiling is the maximum altitude of an aircraft during normal operations. Specifically, it is the density altitude at which flying in a clean configuration , at the best rate of climb airspeed for that altitude and with all engines operating and producing maximum continuous power, will produce a given rate of climb.

  4. Dropped ceiling - Wikipedia

    en.wikipedia.org/wiki/Dropped_ceiling

    A dropped ceiling is a secondary ceiling, hung below the main (structural) ceiling. It may also be referred to as a drop ceiling , T-bar ceiling , false ceiling , suspended ceiling , grid ceiling , drop in ceiling , drop out ceiling , or ceiling tiles and is a staple of modern construction and architecture in both residential and commercial ...

  5. Acoustic ceiling - Wikipedia

    en.wikipedia.org/wiki/Acoustic_ceiling

    Acoustic ceiling may refer to: Dropped ceiling; Popcorn ceiling This page was last edited on 27 ...

  6. Plenum space - Wikipedia

    en.wikipedia.org/wiki/Plenum_space

    Vertical section through a commercial building using HVAC plenum instead of airspace plenum. When both the supply and return ducts are constructed in this manner, it is possible to insulate the ducts and the dropped ceiling so that the upper airspace is not heated or cooled, increasing energy efficiency. This is a fully enclosed plenum.

  7. “No More Linkin Park For Me”: Band’s New Singer Emily ...

    www.aol.com/linkin-park-singer-emily-armstrong...

    Emily, who previously dropped out of high school to chase her dream career, ... Emily Armstrong was announced as the band’s new singer in a live stream on September 5, replacing the late Chester ...

  8. Ceiling (cloud) - Wikipedia

    en.wikipedia.org/wiki/Ceiling_(cloud)

    In aviation, ceiling is a measurement of the height of the base of the lowest clouds (not to be confused with cloud base which has a specific definition) ...

  9. Equations for a falling body - Wikipedia

    en.wikipedia.org/wiki/Equations_for_a_falling_body

    During the first 0.05 s the ball drops one unit of distance (about 12 mm), by 0.10 s it has dropped at total of 4 units, by 0.15 s 9 units, and so on. Near the surface of the Earth, the acceleration due to gravity g = 9.807 m/s 2 ( metres per second squared , which might be thought of as "metres per second, per second"; or 32.18 ft/s 2 as "feet ...