![]() Cubits of various lengths were used in Antiquity by various peoples, not only the Hebrews. The cubit is, among others, a unit used in the Bible for measuring the size of Noah's Ark and of the Ark of the Covenant. This distance is equal to about 15.8 light-years, 149.6 Pm, or 4.8 parsecs, and is about twice the distance from Earth to the star Sirius. ![]() The siriometer is an obsolete astronomical measure equal to one million astronomical units, i.e., one million times the average distance between the Sun and Earth. A little less than 400 lunar distances make up an astronomical unit. The lunar distance is approximately 384,400 km (238,900 mi), or 1.28 light-seconds this is roughly 30 times Earth's diameter. Lunar distance (LD), the distance from the centre of Earth to the centre of the Moon, is a unit of measure in astronomy. The globally-average radius of Earth, generally given as 6,371 kilometres (3,959 miles), is often employed as a unit of measure to intuitively compare objects of planetary size. Within a typical large North American city, it is often only possible to travel along east–west and north–south streets, so travel distance between two points is often given in the number of blocks east–west plus the number north–south (known to mathematicians as the Manhattan Metric). Sometimes people living in places (like Manhattan) with a regularly spaced street grid will speak of long blocks and short blocks. In Manhattan, the measurement "block" usually refers to a north–south block, which is 1⁄ 20 mi (80 m). In most US cities, a city block is between 1⁄ 16 and 1⁄ 8 mi (100 and 200 m). The recommended field size is 105 m × 68 m (115 yd × 74 yd) for major competitions such as the FIFA World Cup, UEFA European Championship and UEFA Champions League.Ī Canadian football field is 65 yd (59 m) wide and 150 yd (140 m) long, including two 20 yd (18 m) long end zones. Īn association football pitch may vary within limits of 90–120 m (98–131 yd) in length and 45–90 m (49–98 yd) in width. The Racing Rules of Sailing also makes heavy use of boat lengths.Ī football field is often used as a comparative measurement of length when talking about distances that may be hard to comprehend when stated in terms of standard units.Īn American football field is usually understood to be 100 yards (91 m) long, though it is technically 120 yards (110 m) when including the two 10 yd (9.1 m) long end zones. A shorter distance is the canvas, which is the length of the covered part of the boat between the bow and the bow oarsman. The length of a rowing eight is about 62 feet (19 m). In rowing races such as the Oxford and Cambridge Boat Race, the margin of victory and of defeat is expressed in fractions and multiples of boat lengths. Shorter distances are measured in fractions of a horse length also common are measurements of a full or fraction of a head, a neck, or a nose. Horses are used to measure distances in horse racing – a horse length (shortened to merely a length when the context makes it obvious) equals roughly 8 feet or 2.4 metres. Rack unit A typical section of rack rail, showing rack unit distribution This means that 1 Hammer unit is equal to exactly 19.05 millimetres or 0.75 inches (3/4"). The exact definition varies from game to game, but a Hammer unit is usually defined as a sixteenth of a foot (16 Hammer units = 1 foot). This unit refers to Source's official map creation software, Hammer. ![]() Valve's Source game engine uses the Hammer unit as its base unit of length. One HP is 0.2 inches (1/5") or 5.08 millimetres wide. Horizontal pitch (HP) is a unit of length defined by the Eurocard printed circuit board standard used to measure the horizontal width of rack mounted electronic equipment, similar to the rack unit (U) used to measure vertical heights of rack mounted equipment. Many of the unusual units of measurements listed here are colloquial measurements, units devised to compare a measurement to common and familiar objects. For unusual units of measure invented primarily for amusement, see List of humorous units of measurement.Īn unusual unit of measurement is a unit of measurement that does not form part of a coherent system of measurement, especially because its exact quantity may not be well known or because it may be an inconvenient multiple or fraction of a base unit. For units of measure primarily used in countries where English is not the main language, see the article specific to that country, a list of which can be found in the systems of measurement article.
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