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  2. Orders of magnitude (length) - Wikipedia

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

    11 meters – approximate width of a doubles tennis court; 15 meterswidth of a standard FIBA basketball court; 15.24 meterswidth of an NBA basketball court (50 feet) 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) [126]

  3. 10-meter band - Wikipedia

    en.wikipedia.org/wiki/10-meter_band

    Since 10 meters can frequently open up to propagate globally, most 10-meter repeaters use a CTCSS sub-audible access tone. 16 kHz-wide signals with 5 kHz deviation is normal in this band. 8 kHz-wide signals with 2.5 kHz deviation can also be found. 2.5kHz deviation is mandated by FCC rules below 29.0 MHz.

  4. American football field - Wikipedia

    en.wikipedia.org/wiki/American_football_field

    The goal lines span the width of the field and run 10 yards (9.1 m) parallel to each end line. The 100 yards between the goal lines where most gameplay occurs is officially called the field of play in the NFL rulebook. Additional lines span the width of the field at 5-yard intervals from each goal line.

  5. Angstrom - Wikipedia

    en.wikipedia.org/wiki/Angstrom

    Portrait of Anders Ångström [15]. In 1868, Swedish physicist Anders Jonas Ångström created a chart of the spectrum of sunlight, in which he expressed the wavelengths of electromagnetic radiation in the electromagnetic spectrum in multiples of one ten-millionth of a millimetre (or 10 −7 mm.) [16] [17] Ångström's chart and table of wavelengths in the solar spectrum became widely used in ...

  6. Football pitch - Wikipedia

    en.wikipedia.org/wiki/Football_pitch

    The two goal lines are between 50 and 100 yards (46 and 91 metres) wide and have to be of the same length. [3] The two touchlines are between 100 and 130 yards (91 and 119 metres) long and have to be of the same length. [3] All lines on the ground are equally wide, not to exceed 12 centimetres (5 inches). [3]

  7. Tennis court - Wikipedia

    en.wikipedia.org/wiki/Tennis_court

    The court is 78 ft (23.77 m) long. Its width is 27 ft (8.23 m) for singles matches and 36 ft (10.97 m) for doubles matches. [2] The service line is 21 ft (6.40 m) from the net. [2] Additional clear space around the court is needed in order for players to reach overrun balls for a total of 60 ft (18 m) wide and 120 ft (37 m) long.

  8. Hair's breadth - Wikipedia

    en.wikipedia.org/wiki/Hair's_breadth

    This measurement is not precise because human hair varies in diameter, ranging anywhere from 17 μm to 181 μm [millionths of a metre] [8] One nominal value often chosen is 75 micrometres (0.0030 in), [5] but this – like other measures based upon such highly variable natural objects, including the barleycorn [9] – is subject to a fair degree of imprecision.

  9. Length - Wikipedia

    en.wikipedia.org/wiki/Length

    Various terms for the length of a fixed object are used, and these include height, which is vertical length or vertical extent, width, breadth, and depth. Height is used when there is a base from which vertical measurements can be taken. Width and breadth usually refer to a shorter dimension than length. Depth is used for the measure of a third ...