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  2. Orders of magnitude (length) - Wikipedia

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

    The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 metres (⁠ 1 / 1 000 ⁠ m = 0.001 m). To help compare different orders of magnitude , this section lists lengths between 10 −3 m and 10 −2 m (1 mm and 1 cm).

  3. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The French scale measures and is proportional to the outer diameter of a catheter, with 1 French (Fr) defined as 1 ⁄ 3 millimeter, making the relationship: 1 mm = 3 Fr. Thus, the outer diameter of a catheter in millimeters can be calculated by dividing the French size by 3. [ 2 ]

  4. Ball (association football) - Wikipedia

    en.wikipedia.org/wiki/Ball_(association_football)

    Regulation size and weight for a football is a circumference of 68–70 cm (27–28 in) and a weight of 410–450 g (14–16 oz). The ball is inflated to a pressure of 0.6–1.1 bars (8.7–16.0 psi) at sea level. [20] This is known as "Size 5". Smaller balls, Sizes 1, 3, and 4, are also produced for younger players or as training tools. [20]

  5. .177 caliber - Wikipedia

    en.wikipedia.org/wiki/.177_caliber

    It is also used in field target competitions, where it competes with .20 caliber (5 mm) and .22 caliber (5.6 mm) rifles. Steel BBs are typically slightly smaller than lead BBs at 0.175-inch (4.4 mm) diameter, although the bore diameter of the barrel are the same. Some air guns are designed to accept .177 pellets, .177 lead shot, or .175 steel ...

  6. Rules of snooker - Wikipedia

    en.wikipedia.org/wiki/Rules_of_snooker

    No weight for the balls is specified in the rules, only that the weight of any two balls should not differ by more than 0.5 g. Some recreational sets (which are usually not measured metrically) are 2 + 1 ⁄ 8 in (about 54 mm) up to as large as pool balls, at 2 + 1 ⁄ 4 in (about 57.2 mm); larger ball size requires wider pocket openings ...

  7. 16-inch softball - Wikipedia

    en.wikipedia.org/wiki/16-inch_softball

    16-inch softball (sometimes called clincher, mushball, [1] cabbageball, [2] [3] puffball, blooperball, smushball, [4] and Chicago ball [5] [6]) is a variant of softball, but using a larger ball that gradually becomes softer the more the ball is hit, and played with no gloves or mitts on the fielders.

  8. 11 mm caliber - Wikipedia

    en.wikipedia.org/wiki/11_mm_caliber

    This is a list of firearm cartridges which have bullets in the 11 millimetres (0.43 in) to 11.99 millimetres (0.472 in) caliber range.. Length refers to the cartridge case length

  9. Volume of an n-ball - Wikipedia

    en.wikipedia.org/wiki/Volume_of_an_n-ball

    Volumes of balls in dimensions 0 through 25; unit ball in red. In geometry, a ball is a region in a space comprising all points within a fixed distance, called the radius, from a given point; that is, it is the region enclosed by a sphere or hypersphere. An n-ball is a ball in an n-dimensional Euclidean space.