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  2. Board foot - Wikipedia

    en.wikipedia.org/wiki/Board_foot

    The board foot or board-foot is a unit of measurement for the volume of lumber in the United States and Canada [1].It equals the volume of a board that is one foot (30.5 cm) in length, one foot in width, and one inch (2.54 cm) in thickness, or exactly 2.359 737 216 liters.

  3. Pressure altitude - Wikipedia

    en.wikipedia.org/wiki/Pressure_altitude

    QNE is an aeronautical code Q code.The term refers to the indicated altitude at the landing runway threshold when or is set in the altimeter's Kollsman window. It is the pressure altitude at the landing runway threshold.

  4. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    In the cases where non-SI units are used, the numerical calculation of a formula can be done by first working out the factor, and then plug in the numerical values of the given/known quantities. For example, in the study of Bose–Einstein condensate , [ 6 ] atomic mass m is usually given in daltons , instead of kilograms , and chemical ...

  5. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    ft (Cla) ≈ 0.304 797 2654 m: foot (Indian) (H) ft Ind ≈ 0.304 799 514 m: foot, metric: mf ≡ 300 mm ≡ 0.3 m foot, metric (Mesures usuelles) (H) ≡ 1 ⁄ 3 m ≡ 0. 3 m foot (International) ft ≡ 0.3048 m ≡ 1 ⁄ 3 yd ≡ 12 inches ≡ 0.3048 m foot (Sear's) (H) ft (Sear) ≈ 0.304 799 47 m: foot (US Survey) ft (US) ≡ 1200 ⁄ 3937 ...

  6. Barometric formula - Wikipedia

    en.wikipedia.org/wiki/Barometric_formula

    The barometric formula is a formula used to model how the pressure (or density) ... = universal gas constant; using feet, kelvins, and (SI) moles: 8.949 ...

  7. Flight level - Wikipedia

    en.wikipedia.org/wiki/Flight_level

    The rule affected only those aircraft operating under IFR when in level flight above 3,000 ft above mean sea level, or above the appropriate transition altitude, whichever is the higher, and when below FL195 (19,500 ft above the 1013.2 hPa datum in the UK, or with the altimeter set according to the system published by the competent authority in ...

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  9. Speeds and feeds - Wikipedia

    en.wikipedia.org/wiki/Speeds_and_feeds

    Cutting speed may be defined as the rate at the workpiece surface, irrespective of the machining operation used. A cutting speed for mild steel of 100 ft/min is the same whether it is the speed of the cutter passing over the workpiece, such as in a turning operation, or the speed of the cutter moving past a workpiece, such as in a milling operation.