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  2. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    An adult human foot is about 28 cm (11 in) long. The decimetre ( SI symbol: dm ) is a unit of length in the metric system equal to 10 −1 metres ( ⁠ 1 / 10 ⁠ m = 0.1 m ). To help compare different orders of magnitude , this section lists lengths between 10 centimeters and 100 centimeters (10 −1 meter and 1 meter).

  3. List of track gauges - Wikipedia

    en.wikipedia.org/wiki/List_of_track_gauges

    Faxe Jernbane in southern Zealand, 791 mm 2 ft 7 + 5 ⁄ 32 in and 785 mm 2 ft 6 + 29 ⁄ 32 in, 2½ feet (785 mm) both gauges were used at Faxe Jernbane and Faxe limestone quarry, none remains, only a few materials and trains from Faxe Jernbane and Faxe limestone quarry remains for preservation on Hedeland veteran railway dk.

  4. 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 ...

  5. Breitspurbahn - Wikipedia

    en.wikipedia.org/wiki/Breitspurbahn

    3,000 mm (9 ft 10 1 ... with track gauges ranging from 9 to 18 feet (2750 to 5500 mm). Locomotive options added nuclear-powered locomotives, and passenger carriages ...

  6. Track gauge in the United States - Wikipedia

    en.wikipedia.org/wiki/Track_gauge_in_the_United...

    Some railways, primarily in the northeast, used standard gauge of 4 ft 8 + 1 ⁄ 2 in (1,435 mm); others used gauges ranging from 2 ft (610 mm) to 6 ft (1,829 mm). As a general rule, southern railroads were built to one or another broad gauge, mostly 5 ft ( 1,524 mm ), while northern railroads that were not standard-gauge tended to be narrow-gauge.

  7. Template:Convert - Wikipedia

    en.wikipedia.org/wiki/Template:Convert

    Converts measurements to other units. Template parameters [Edit template data] This template prefers inline formatting of parameters. Parameter Description Type Status Value 1 The value to convert. Number required From unit 2 The unit for the provided value. Suggested values km2 m2 cm2 mm2 ha sqmi acre sqyd sqft sqin km m cm mm mi yd ft in kg g mg lb oz m/s km/h mph K C F m3 cm3 mm3 L mL cuft ...

  8. Standard-gauge railway - Wikipedia

    en.wikipedia.org/wiki/Standard-gauge_railway

    The distance between the inside edges of the heads of the rails is defined to be 1,435 mm except in the United States, Canada, and on some heritage British lines, where it is defined in U.S. customary/customary UK units as exactly "four feet eight and one half inches", [7] which is equivalent to 1,435.1 mm.

  9. Track gauge - Wikipedia

    en.wikipedia.org/wiki/Track_gauge

    If the difference between the two gauges is large enough – for example between 1,435 mm (4 ft 8 + 1 ⁄ 2 in) standard gauge and 3 ft 6 in (1,067 mm) – three-rail dual-gauge is possible, but if not – for example between 3 ft 6 in (1,067 mm) and 1,000 mm (3 ft 3 + 3 ⁄ 8 in) metre gauge – four rails must be used. Dual-gauge rail lines ...