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Inch of mercury

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  1. inHg or "Hg is a measuring unit for pressure

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 13, 2009
  2. still widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 13, 2009
  3. defined as the pressure exerted by a column of mercury of 1 inch in height at 32 °F (0 °C) at the standard acceleration of gravity

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 13, 2009
  4. Aircraft operating at higher altitudes (at or above what is called the Transition Altitude, which varies by country) set their barometric altimeters to a standard pressure of 29.92 inHg or 1,013.2 hPa (1 hPa = 1 mbar) regardless of the actual sea lev

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 13, 2009
  5. The resulting altimeter readings are known as flight levels

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 13, 2009
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