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  2. Orders of magnitude (length) - Wikipedia

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

    10.16 cm = 1.016 dm – 1 hand used in measuring height of horses (4 inches) 12 cm = 1.2 dm – diameter of a compact disc (CD) (= 120 mm) 15 cm = 1.5 dm – length of a Bic pen with cap on; 22 cm = 2.2 dm – diameter of a typical association football (soccer ball) 30 cm = 3 dm – typical school-use ruler length (= 300 mm)

  3. Human height - Wikipedia

    en.wikipedia.org/wiki/Human_height

    Height measurement using a stadiometer. Human height or stature is the distance from the bottom of the feet to the top of the head in a human body, standing erect.It is measured using a stadiometer, [1] in centimetres when using the metric system or SI system, [2] [3] or feet and inches when using United States customary units or the imperial system.

  4. Tape measure - Wikipedia

    en.wikipedia.org/wiki/Tape_measure

    The first patented long tape measure in the United States was granted on 10 July 1860 to William H. Paine, and produced by George M. Eddy and Company. [12] This design lacked any measurement points on it. Instead, it functioned as a singular unit of measurement, with the entire length of the tape representing a fixed distance. [13]

  5. Angular diameter - Wikipedia

    en.wikipedia.org/wiki/Angular_diameter

    Angular sizes measured in degrees are useful for larger patches of sky. (For example, the three stars of the Belt cover about 4.5° of angular size.) However, much finer units are needed to measure the angular sizes of galaxies, nebulae, or other objects of the night sky. Degrees, therefore, are subdivided as follows: 360 degrees (°) in a full ...

  6. Metre - Wikipedia

    en.wikipedia.org/wiki/Metre

    The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of ⁠ 1 / 299 792 458 ⁠ of a second, where the second is defined by a hyperfine transition frequency of caesium.

  7. Average human height by country - Wikipedia

    en.wikipedia.org/wiki/Average_human_height_by...

    Conscripts, 19 (N= m:12,447, Median= m:178.0 cm (5 ft 10 in), SD= m:6.52 cm (2.6 in)) 1.5%: Measured: 2009 [190] Switzerland: 175.4 cm (5 ft 9 in) 164 cm (5 ft 4 + 1 ⁄ 2 in) 1.07: 20–74: 88.8%: Self-reported: 1987–1994 [188] Taiwan: 171.4 cm (5 ft 7 + 1 ⁄ 2 in) 159.9 cm (5 ft 3 in) 1.07: 17 (N= m:200 f:200) 0.0%: Measured: 2011 [191 ...

  8. Vernier scale - Wikipedia

    en.wikipedia.org/wiki/Vernier_scale

    Vernier caliper with a vernier constant of 0.1 for clarity of operation. The standard for a caliper is usually a constant of 0.02 Vernier caliper scale with the normal 0.02 vernier constant, showing measurement of object at 19.44 mm to two decimal places

  9. Li (unit) - Wikipedia

    en.wikipedia.org/wiki/Li_(unit)

    These measurements have been confirmed in many ways including the discovery of a number of rulers found at archaeological sites, and careful measurements of distances between known points. [2] The Han li was calculated by Dubs to be 415.8 metres [ 3 ] and all indications are that this is a precise and reliable determination.

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