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  2. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    The United States retained the ⁠ 1 / 39.37 ⁠-metre definition for surveying, producing a 2 millionth part difference between standard and US survey inches. [47] This is approximately ⁠ 1 / 8 ⁠ inch per mile; 12.7 kilometres is exactly 500,000 standard inches and exactly 499,999 survey inches.

  3. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    In addition to decimal time, there also exist binary clocks and hexadecimal time. The Swatch Internet Time system is based on Decimal time. Many mechanical stopwatches are of the 'decimal minute' type. These split one minute into 100 units of 0.6s each. This makes addition and subtraction of times easier than using regular seconds.

  4. Square inch - Wikipedia

    en.wikipedia.org/wiki/Square_inch

    0.006 9 4 square feet (1 square foot is equal to 144 square inches) 0.000 7 71 604 9382 square yards (1 square yard is equal to 1,296 square inches) 6.4516 square centimetres (1 square centimetre is equal to 0.155 000 310... square inches) 0.000 645 16 square metres (1 square metre is equal to 1,550.003 100... square inches)

  5. Grade (slope) - Wikipedia

    en.wikipedia.org/wiki/Grade_(slope)

    as a ratio of many parts run to one part rise, which is the inverse of the previous expression (depending on the country and the industry standards). For example, "slopes are expressed as ratios such as 4:1. This means that for every 4 units (feet or metres) of horizontal distance there is a 1 unit (foot or metre) vertical change either up or ...

  6. Marla (unit) - Wikipedia

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

    The marla is a traditional unit of area that is used in India, Pakistan and Bangladesh. The marla was standardized under British raj to be equal to the square rod, or 272.25 square feet, 30.25 square yards, or 25.2929 square metres.

  7. Cubic inch - Wikipedia

    en.wikipedia.org/wiki/Cubic_inch

    The cubic inch (symbol in 3) is a unit of volume in the Imperial units and United States customary units systems. It is the volume of a cube with each of its three dimensions (length, width, and height) being one inch long which is equivalent to 1 ⁄ 231 of a US gallon.

  8. 6.5mm Creedmoor - Wikipedia

    en.wikipedia.org/wiki/6.5mm_Creedmoor

    The 6.5mm Creedmoor designated as 6.5 Creedmoor by SAAMI, and as 6,5 Creedmoor by the C.I.P. [4] is a centerfire rifle cartridge introduced by Hornady in 2007. [6]It was developed by Hornady senior ballistics scientist Dave Emary in partnership with Dennis DeMille, the vice-president of product development at Creedmoor Sports, hence the name.

  9. Telescopic sight - Wikipedia

    en.wikipedia.org/wiki/Telescopic_sight

    If a target of a known diameter of 16 inches fills just half of the total post-to-post distance (i.e. filling from sight center to post), then the distance to target is approximately 200 yards (180 m). With a target of a diameter of 16 inches that fills the entire sight picture from post to post, the range is approximately 100 yards.