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  2. Orders of magnitude (length) - Wikipedia

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

    The location marker posts are installed at 100-meter intervals. [130] The hectometre (SI symbol: hm) is a unit of length in the metric system equal to 100 meters (10 2 m). To compare different orders of magnitude this section lists lengths between 100 meters and 1,000 meters (1 kilometer).

  3. 100 metres - Wikipedia

    en.wikipedia.org/wiki/100_metres

    The 100 metres, or 100-meter dash, is a sprint race in track and field competitions. The shortest common outdoor running distance, the 100-meter (109.36 yd) dash is one of the most popular and prestigious events in the sport of athletics. It has been contested at the Summer Olympics since 1896 for men and since 1928 for women.

  4. List of metric units - Wikipedia

    en.wikipedia.org/wiki/List_of_metric_units

    The outhouse is a unit of area used in nuclear physics equal to 10 −6 barns (100 am 2 = 10 −34 m 2). The barn (b) is a unit of area used in nuclear physics equal to one hundred femtometres squared (100 fm 2 = 10 −28 m 2). The are (a) is a unit of area equal to 100 m 2. The decare (daa) is a unit of area equal to 1000 m 2.

  5. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    A common adjustment value in firearm sights is 1 cm at 100 meters which equals ⁠ 10 mm / 100 m ⁠ = ⁠ 1 / 10 ⁠ mrad. The true definition of a milliradian is based on a unit circle with a radius of one and an arc divided into 1,000 mrad per radian, hence 2,000 π or approximately 6,283.185 milliradians in one turn , and rifle scope ...

  6. Hectare - Wikipedia

    en.wikipedia.org/wiki/Hectare

    The hectare (/ ˈ h ɛ k t ɛər,-t ɑːr /; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100-metre sides (1 hm 2), that is, 10,000 square metres (10,000 m 2), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectares and one hectare contains about ...

  7. Ancient Greek units of measurement - Wikipedia

    en.wikipedia.org/wiki/Ancient_Greek_units_of...

    Equal to Modern equivalent Description pous πούς: 0.095 m 2 (1.02 sq ft) square foot hexapodēs ἑξαπόδης: 36 podes 3.42 m 2 (36.8 sq ft) square six-foot akaina ἄκαινα: 100 podes 9.50 m 2 (102.3 sq ft) rod hēmiektos ἡμίεκτος: 833 + 1 ⁄ 3 podes 79.2 m 2 (853 sq ft) half a sixth hektos ἕκτος: 1,666 + 2 ⁄ 3 podes

  8. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    Here, the base units are the quad, equal to 10 7 m (approximately a quadrant of the Earth's circumference), the eleventhgram, equal to 10 −11 g, and the second. These were chosen so that the corresponding electrical units of potential difference, current and resistance had a convenient magnitude. [36]: 268 [37]: 17

  9. Unit of length - Wikipedia

    en.wikipedia.org/wiki/Unit_of_length

    The base unit in the International System of Units (SI) is the meter, defined as "the length of the path travelled by light in vacuum during a time interval of 1 ⁄ 299792458 seconds." [9] It is approximately equal to 1.0936 yd.