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  2. Scale height - Wikipedia

    en.wikipedia.org/wiki/Scale_height

    Scale height. The earth atmosphere's scale height is about 8.5 km, as can be confirmed from this diagram of air pressure p by altitude h: At an altitude of 0, 8.5, and 17 km, the pressure is about 1000, 370, and 140 hPa, respectively. In atmospheric, earth, and planetary sciences, a scale height, usually denoted by the capital letter H, is a ...

  3. North American Vertical Datum of 1988 - Wikipedia

    en.wikipedia.org/wiki/North_American_Vertical...

    It held fixed the height of the primary tide gauge benchmark, referenced to the International Great Lakes Datum of 1985 local mean sea level (MSL) height value, at Rimouski, Quebec, Canada. Additional tidal bench mark elevations were not used due to the demonstrated variations in sea surface topography , i.e., that MSL is not the same ...

  4. Precision approach path indicator - Wikipedia

    en.wikipedia.org/wiki/Precision_Approach_Path...

    Harmonisation between PAPIs and an ILS system must take into account the distance between eye height and ILS receiver height for various aircraft. [1]: 8–33 For a typical 3 degree approach slope, PAPI lights should be angled as follows: 3°30', 3°10', 2°50', 2°30' (3.50°, 3.17°, 2.83°, 2.50°). [1]: 8–36

  5. Radio masts and towers - Wikipedia

    en.wikipedia.org/wiki/Radio_masts_and_towers

    The pointed lower end of the antenna ended in a large ceramic insulator in the form of a ball-and-socket joint on a concrete base, relieving bending moments on the structure. The first, a 665 foot (203 m) half-wave mast was installed at radio station WABC 's 50 kW transmitter at Wayne, New Jersey in 1931.

  6. Average human height by country - Wikipedia

    en.wikipedia.org/wiki/Average_human_height_by...

    According to a study in France, executives and professionals are 2.6 centimetres (1.0 in) taller, and university students are 2.55 centimetres (1.0 in) taller than the national average. [ 7 ] As this case shows, data taken from a particular social group may not represent a total population in some countries.

  7. Standing desk - Wikipedia

    en.wikipedia.org/wiki/Standing_desk

    To solve this issue, a standing desk may either be custom-made, to suit the height of the user, or made with adjustable parts. For writing or drafting, the angle or slant of the surface may be adjustable, with a typical drawing table or table à la tronchin. If the desk is made for computer use, the legs may be adjustable. Another option is a ...

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