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  2. Orders of magnitude (length) - Wikipedia

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

    18.44 meters – distance between the front of the pitcher's rubber and the rear point of home plate on a baseball field (60 feet, 6 inches) [125] 20 meters – length of cricket pitch (22 yards) [126] 27.43 meters – distance between bases on a baseball field (90 feet) 28 meters – length of a standard FIBA basketball court; 28.65 meters ...

  3. Template:Convert/list of units - Wikipedia

    en.wikipedia.org/wiki/Template:Convert/list_of_units

    US spelling: meter per second: 1.0 m/s (3.3 ft/s) m/s ft/s (m/s foot/s) non-SI metric: kilometre per hour: km/h km/h US spelling: kilometer per hour: 1.0 km/h (0.62 mph) km/h mph; Imperial & US customary: mile per hour: mph mph 1.0 mph (1.6 km/h) mph km/h; mph kn; foot per second: ft/s (foot/s) ft/s long code "foot/s" outputs foot per second ...

  4. Acre-foot - Wikipedia

    en.wikipedia.org/wiki/Acre-foot

    Since an acre is defined as a chain by a furlong (i.e. 66 ft × 660 ft or 20.12 m × 201.17 m), an acre-foot is 43,560 cubic feet (1,233.5 m 3). There has been two definitions of the acre-foot (differing by about 0.0006%), using either the international foot (0.3048 m) or a U.S. survey foot (exactly ⁠ 1200 / 3937 ⁠ meters since

  5. 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.

  6. Amateur radio frequency allocations - Wikipedia

    en.wikipedia.org/wiki/Amateur_radio_frequency...

    in parts of ITU Region 1 6 metres: 50–54 MHz 50–52 MHz In parts of ITU Region 1 5 metres: 58.0–60.1 MHz: in parts of ITU Region 1 4 metres: 70–70.5 MHz: in parts of ITU Region 1 2 metres: 144–148 MHz 144–146 MHz ITU Region 1 1.25 metres 219–220 MHz Fixed digital message forwarding systems 222–225 MHz: US & Canada UHF

  7. Planck units - Wikipedia

    en.wikipedia.org/wiki/Planck_units

    [11]: 370 Since the 1950s, it has been conjectured that quantum fluctuations of the spacetime metric might make the familiar notion of distance inapplicable below the Planck length. [ 24 ] [ 39 ] [ 22 ] This is sometimes expressed by saying that "spacetime becomes a foam at the Planck scale ". [ 40 ]

  8. Metre per second - Wikipedia

    en.wikipedia.org/wiki/Metre_per_second

    ft/s 3.2808 The metre per second is the unit of both speed (a scalar quantity ) and velocity (a vector quantity , which has direction and magnitude) in the International System of Units (SI), equal to the speed of a body covering a distance of one metre in a time of one second .

  9. Bofors 40 mm L/60 gun - Wikipedia

    en.wikipedia.org/wiki/Bofors_40_mm_L/60_gun

    This refers to the length of the barrel – 2,250 mm – when equipped with the conical flash hider – 250 mm (9.8 in); amounting to a length of 2,500 mm (8 ft 2 in), or 62.5 calibres. [20] Similarly, the shorter L/43 calibre length – 1,720 mm (5 ft 8 in) – refers to the length of the barrel and breech mounted as a unit. [20]