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Conversion Of Units
CONVERSION OF UNITS is the conversion between different units of measurement for the same quantity , typically through multiplicative CONVERSION FACTORS
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Rod (length)
The ROD or PERCH or POLE is a surveyors tool and unit of length equal to  5 1⁄2 yards , 16 1⁄2 feet ,  1⁄320 of a statute mile or one-fourth of a surveyor\'s chain and 5.0292 meters . The rod is useful as a unit of length because whole number multiples of it can form one acre of square measure. The 'perfect acre' is a rectangular area of 43,560 square feet, bounded by sides of length 660 feet and 66 feet (220 yards and 22 yards) or, equivalently, 40 rods and 4 rods. An acre is therefore 160 square rods. Since the adoption of the international yard on 1 July 1959, the rod has been equal to exactly 5.0292 meters . A rod is the same length as a perch, also sometimes called a POLE which measure using cordage or wood, slightly antedated the use of both rods and surveyors chains, made of more dimensionally regular materials
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Cubit
The CUBIT is an ancient unit based on the forearm length from the tip of the middle finger to the bottom of the elbow . Cubits of various lengths were employed in many parts of the world in antiquity , during the Middle Ages
Middle Ages
and as recently as Early Modern Times . The term is still used in hedge laying , the length of the forearm being frequently used to determine the interval between stakes placed within the hedge. CONTENTS * 1 Etymology * 2 Ancient Egyptian royal cubit * 3 Sumerian or Nippur cubit * 4 Biblical cubit * 5 Ancient Greece * 6 Ancient Rome
Ancient Rome
* 7 Other systems * 8 Cubit
Cubit
arm in heraldry * 9 See also * 10 References * 11 Bibliography * 12 External links ETYMOLOGYThe English word "cubit" comes from the Latin noun cubitus "elbow", from the verb cubo, cubare, cubui, cubitum "to lie down", from which also comes the adjective "recumbent"
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Ell
An ELL (from Proto-Germanic *alinō, cognate with Latin
Latin
ulna ) is a unit of measurement , originally a cubit , i.e., approximating the length of a man's arm from the elbow ("elbow" means the bend or bow of the ell or arm) to the tip of the middle finger, or about 18 inches (457 mm); in later usage, any of several longer units. In English-speaking countries, these included (until the 19th century) the Flemish ell ( 3⁄4 of a yard), English ell ( 1 1⁄4 yards) and French ell ( 1 1⁄2 yards), some of which are thought to derive from a "double ell"
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Edmund Gunter
EDMUND GUNTER (1581 – 10 December 1626), was an English clergyman , mathematician , geometer and astronomer of Welsh descent. He is best remembered for his mathematical contributions which include the invention of the Gunter\'s chain , the Gunter\'s quadrant , and the Gunter\'s scale . In 1620, he invented the first successful analog device which he developed to calculate logarithmic tangents. He was mentored in mathematics by Reverend Henry Briggs and eventually became a Gresham Professor of Astronomy , from 1619 until his death. CONTENTS * 1 Biography * 2 Gunter\'s chain * 3 Gunter\'s quadrant * 4 Gunter\'s scale * 5 Gunter rig * 6 See also * 7 References * 8 External links BIOGRAPHYGunter was born in Hertfordshire in 1581. He was educated at Westminster School
Westminster School
, and in 1599 he matriculated at Christ Church, Oxford
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Chain (unit)
A CHAIN is a unit of length that measures 66 feet , 22 yards , 100.084 links , or 4 rods (20.1168 m ). There are 10 chains in a furlong , and 80 chains in one statute mile . An acre is the area of 10 square chains (that is, an area of one chain by one furlong). The chain has been used for several centuries in Britain and in some other countries influenced by British practice. By extension, CHAINAGE (running distance) is the distance along a curved or straight survey line from a fixed commencing point, as given by an odometer . CONTENTS * 1 Origin * 2 Instrument * 2.1 Ramsden\'s chain * 2.2 Other instruments * 3 Contemporary use * 3.1 Cricket pitches * 3.2 Texas
Texas
chain * 3.3 Australian and New Zealand
New Zealand
use * 3.4 North America * 4 References * 5 External links ORIGIN This section DOES NOT CITE ANY SOURCES . Please help improve this section by adding citations to reliable sources
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Inch
The INCH (abbreviation: IN or ″ ) is a unit of length in the (British) imperial and United States customary systems of measurement now formally equal to  1⁄36 yard but usually understood as  1⁄12 of a foot . Derived from the Roman uncia ("twelfth"), inch is also sometimes used to translate related units in other measurement systems, usually understood as deriving from the width of the human thumb . Traditional standards for the exact length of an inch have varied in the past, but since the adoption of the international yard during the 1950s and 1960s it has been based on the metric system and defined as exactly 2.54 cm
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MOS
MOS may refer to: * mos, the singular form of mōrēs * Mos, Spain
Mos, Spain
, a municipality in Galicia, Spain in the province of Pontevedra * Mos, a traditional dish of the Nivkh people * Mos language , an aboriginal Mon–Khmer language of Malaya and Thailand * Mos Def
Mos Def
, American hip hop artist and actor * Wash, in Hungarian .CONTENTS * 1 Government and military * 2 Places * 3 Technology * 3.1 Computing * 4 Other uses * 5 See also GOVERNMENT AND MILITARY * Master of the Sword
Master of the Sword
, the title for the head of physical education at the U.S. Military Academy at West Point * Member of Service , term used to describe any emergency responder (police officer, firefighter, emergency medical technician) that needs emergency help, usually over two-way radio * Military occupation specialty code , used by the U.S
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Foot (unit)
The FOOT (pl. FEET; abbreviation: FT; symbol: ′, the prime symbol ) is a unit of length in the imperial and US customary systems of measurement . Since 1959, both units have been defined by international agreement as equivalent to 0.3048 meters exactly. In both systems, the foot comprises 12 inches and three feet compose a yard . Historically the "foot" was a part of many local systems of units, including the Greek , Roman , Chinese , French , and English systems. It varied in length from country to country, from city to city, and sometimes from trade to trade. Its length was usually between 250 mm and 335 mm and was generally, but not always, subdivided into 12 inches or 16 digits . The United States is the only industrialized nation that uses the international foot and the survey foot (a customary unit of length ) in preference to the meter in its commercial, engineering, and standards activities
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Fathom
A FATHOM is a unit of length in the imperial and the U.S. customary systems equal to 6 feet (1.8288 metres), used especially for measuring the depth of water. There are two yards (6 feet ) in an imperial fathom. Originally the span of a man's outstretched arms, the size of a fathom has varied slightly depending on whether it was defined as a thousandth of an (Admiralty) nautical mile or as a multiple of the imperial yard . Formerly, the term was used for any of several units of length varying around 5–5 1⁄2 feet (1.5–1.7 m)
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Fermi (unit)
The FEMTOMETRE (American spelling FEMTOMETER, symbol FM derived from the Danish and Norwegian word femten, "fifteen"+ Ancient Greek
Ancient Greek
: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres , which means a quadrillionth of one. This distance can also be called a FERMI and was so named in honour of physicist Enrico Fermi
Enrico Fermi
, as it is a typical length-scale of nuclear physics . DEFINITION AND EQUIVALENTS1000 attometres = 1 FEMTOMETRE = 1 FERMI = 0.001 picometre = 6985100000000000000♠1×10−15 metres 7006100000000000000♠1000000 femtometres = 10 ångström = 1 nanometre . For example, the charge radius of a proton is approximately 0.84–0.87 femtometres while the radius of a gold nucleus is approximately 8.45 femtometres. 1 barn = 100 fm2 HISTORYThe femtometre was adopted by the 11th Conférence Générale des Poids et Mesures , and added to SI in 1964
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Line (unit)
The LINE (abbreviated L or L or ‴) was a small English unit of length , variously reckoned as  1⁄10,  1⁄12,  1⁄16, or  1⁄40 of an inch . It was not included among the units authorized as the British Imperial system in 1824. CONTENTS * 1 Size * 2 In use * 3 Foreign units * 4 See also * 5 References * 5.1 Citations * 5.2 Bibliography SIZEThe line was not recognized by any statute of the English Parliament but was usually understood as  1⁄4 of a barleycorn , which itself was recognized by statute as  1⁄3 of an inch but often reckoned as  1⁄4 of an inch instead. The line was eventually decimalized as  1⁄10 of an inch, without recourse to barleycorns. The button trade used the term, redefined as  1⁄40 of an inch . IN USEBotanists formerly used the units (usually as  1⁄12 inch) to measure the size of plant parts
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Link (unit)
The LINK (usually abbreviated as "l.", "li." or "lnk."), sometimes called a GUNTER’S LINK, is a unit of length formerly used in many English-speaking countries. A link is exactly  66⁄100 of a foot , or exactly 7.92 inches or 20.1168 cm. The unit is based on Gunter\'s chain , a metal chain 66 feet long with 100 links, that was formerly used in land surveying . Even after the original tool was replaced by later instruments of higher precision, the unit itself was commonly used in this application throughout the English-speaking world (e.g. in the United States customary system of measurements and the Imperial system ). The length of the foot, and hence the link, varied slightly from place to place and time to time, but in modern times the difference between, say, the US survey foot and the international foot is two parts per million. The link fell out of general use in the 20th century
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League (unit)
A LEAGUE is a unit of length (or, in various regions, area). It was common in Europe and Latin America, but is no longer an official unit in any nation. The word originally meant the distance a person could walk in an hour. Since the Middle Ages, many values have been specified in several countries. CONTENTS* 1 Different definitions * 1.1 Ancient Rome * 1.2 Argentina * 1.3 English-speaking world * 1.4 France * 1.5 Mexico * 1.6 Portuguese-speaking world * 1.7 Spain * 1.8 United States * 2 Comparison table * 3 See also * 4 References DIFFERENT DEFINITIONSANCIENT ROME See also: Ancient Roman units of measurement The league is used in Ancient Rome , defined as  1 1⁄2 Roman miles (7,500 Roman feet , modern 2.2 km or 1.4 miles). The origin is the leuga Gallica (also: leuCa Gallica), the league of Gaul
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Hand (unit)
The HAND is a non-SI unit of measurement of length standardized to 4 inches (101.6 mm). It is used to measure the height of horses in some English-speaking countries, including Australia
Australia
, Canada
Canada
, the Republic of Ireland , the United Kingdom
United Kingdom
and the United States