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Myrio-
Myria- (symbol my) is a now obsolete decimal metric prefix denoting a factor of 104 (ten thousand). It originates from the Greek μύριοι (''mýrioi'') (myriad). The prefix was part of the original metric system adopted by France in 1795, but was not adopted when the SI prefixes were internationally adopted by the 11th CGPM conference in 1960. In 1685 John Wallis proposed the usage of myrio. Also, in 19th century English it was sometimes spelled myrio, in line with a puristic opinion by Thomas Young. The '' myriametre'' (10 km) is occasionally encountered in 19th-century train tariffs, or in some classifications of wavelengths as the adjective '' myriametric''. The French '' mesures usuelles'' (1812-1839) did not include any units of length greater than the '' toise'', but the ''myriametre'' remained in use throughout this period. (Website based on ''Alte Meß- und Währungssysteme aus dem deutschen Sprachgebiet'', .) In Sweden and Norway, the ''myriametre'' is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myriametre
The following are examples of orders of magnitude for different lengths. __TOC__ Overview Detailed list To help compare different orders of magnitude, the following list describes various lengths between 1.6 \times 10^ metres and 10^metres. Subatomic scale Atomic to cellular scale Cellular to human scale Human to astronomical scale Astronomical scale Less than 1 zeptometre The ' ( SI symbol: ') is a unit of length in the metric system equal to . To help compare different orders of magnitude, this section lists lengths shorter than 10−21 m (1 zm). *1.6 × 10−5 quectometres (1.6 × 10−35 metres) – the Planck length (Measures of distance shorter than this do not make physical sense, according to current theories of physics.) *1 qm – 1 quectometre, the smallest named subdivision of the metre in the SI base unit of length, one nonillionth of a metre *1 rm – 1 rontometre, a subdivision of the metre in the SI base unit of length, one octilliont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decimal Prefix
A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The prefix ''kilo-'', for example, may be added to ''gram'' to indicate ''multiplication'' by one thousand: one kilogram is equal to one thousand grams. The prefix ''milli-'', likewise, may be added to ''metre'' to indicate ''division'' by one thousand; one millimetre is equal to one thousandth of a metre. Decimal multiplicative prefixes have been a feature of all forms of the metric system, with six of these dating back to the system's introduction in the 1790s. Metric prefixes have also been used with some non-metric units. The SI prefixes are metric prefixes that were standardised for use in the International System of Units (SI) by the International Bureau of Weights and Measures (BIPM) in resolutions dating from 1960 to 2022. Since 2009, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metric Prefix
A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or submultiple of the unit. All metric prefixes used today are decadic. Each prefix has a unique symbol that is prepended to any unit symbol. The prefix ''kilo-'', for example, may be added to ''gram'' to indicate ''multiplication'' by one thousand: one kilogram is equal to one thousand grams. The prefix '' milli-'', likewise, may be added to ''metre'' to indicate ''division'' by one thousand; one millimetre is equal to one thousandth of a metre. Decimal multiplicative prefixes have been a feature of all forms of the metric system, with six of these dating back to the system's introduction in the 1790s. Metric prefixes have also been used with some non-metric units. The SI prefixes are metric prefixes that were standardised for use in the International System of Units (SI) by the International Bureau of Weights and Measures (BIPM) in resolutions dating from 1960 to 2022. Since 2009, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isaac Asimov
yi, יצחק אזימאװ , birth_date = , birth_place = Petrovichi, Russian SFSR , spouse = , relatives = , children = 2 , death_date = , death_place = Manhattan, New York City, U.S. , nationality = Russian (1920–1922)Soviet (1922–1928)American (1928–1992) , occupation = Writer, professor of biochemistry , years_active = 1939–1992 , genre = Science fiction (hard SF, social SF), mystery, popular science , subject = Popular science, science textbooks, essays, history, literary criticism , education = Columbia University ( BA, MA, PhD) , movement = Golden Age of Science Fiction , module = , signature = Isaac Asimov signature.svg Isaac Asimov ( ; 1920 – April 6, 1992) was an American writer and professor of biochemistry at Boston University. During his lifetime, Asimov was considered one of the "Big Three" science fiction writers, along with Robert A. Heinlein and Arthur C. Clarke. A prolific writer, he wrote or edited more than 500 books ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scandinavian Mile
A Scandinavian mile (Norwegian and sv, mil, [], like "meal") is a unit of length common in Norway and Sweden, but not Denmark. Today, it is standardised as 1 being , but it had different values in the past. The word is derived from the same Roman source as the English mile. In Norway and Sweden, the international mile is formally called "English mile" (), although it is generally just referred to by the English word ''mile''. However, in situations where confusion may arise it is more common for Scandinavians to describe distances in terms of the official SI unit kilometre. This modern definition of 10 kilometres (km) is equivalent to the obsolete myriametre, which was once used in France. History In Norway and Sweden, the old "land mile" or "long mile" was 36,000 feet: because of the different definitions of foot then in use; in Norway this was and in Sweden . There was also a ('forest mile') that was half as long as the normal '. i.e. a bit over , and equal to an even ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myriagramme
The myriagram (french: myriagramme) is a former French and metric unit of mass equal to 10,000 grams (''myriad'' being the Greek word for ten thousand). Although never as widely used as the kilogram, the myriagram was employed during the 19th century as a replacement for the earlier American customary system quarter, which was equal to . In 1975, the United States, having previously authorized use of the myriagram in 1866, declared the term no longer acceptable. See also * myria- Myria- (symbol my) is a now obsolete decimal metric prefix denoting a factor of 104 (ten thousand). It originates from the Greek μύριοι (''mýrioi'') (myriad). The prefix was part of the original metric system adopted by France in 1795, bu ... * History of the International System of Units References Units of mass {{fr-hist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avoirdupois
The avoirdupois system (; abbreviated avdp.) is a measurement system of weights that uses pounds and ounces as units. It was first commonly used in the 13th century AD and was updated in 1959. In 1959, by international agreement, the definitions of the pound and ounce became standardized in countries which use the pound as a unit of mass. The ''International Avoirdupois Pound'' was then created. It is the everyday system of weights used in the United States. It is still used, in varying degrees, in everyday life in the United Kingdom, Canada, New Zealand, Australia, and some other former British colonies, despite their official adoption of the metric system. The avoirdupois weight system's general attributes were originally developed for the international wool trade in the Late Middle Ages, when trade was in recovery. It was historically based on a physical standardized pound or "prototype weight" that could be divided into 16 ounces. There were a number of competing meas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartier (unit)
The quarter ( "one-fourth") was used as the name of several distinct English units based on ¼ sizes of some base unit. The "quarter of London" mentioned by ''Magna Carta'' as the national standard measure for wine, ale, and grain was ¼ ton or tun. It continued to be used, e.g. to regulate the prices of bread. This quarter was a unit of 8 bushels of 8 gallons each, understood at the time as a measure of both weight and volume: the grain gallon or half-peck was composed of 76,800 (Tower) grains weight; the ale gallon was composed of the ale filling an equivalent container; and the wine gallon was composed of the wine weighing an equivalent amount to a full gallon of grain. Length In measures of length, the quarter (qr.) was ¼ of a yard, formerly an important measure in the cloth trade. 3 qr. was a Flemish ell, 4 quarters were a yard, 5 qr. was an (English) ell, and 6 qr. was an aune or French ell. Each quarter was made up of 4 nails. Its metric equivalent was fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foundation And Empire
''Foundation and Empire'' is a science fiction novel by American writer Isaac Asimov originally published by Gnome Press in 1952. It is the second book in the ''Foundation'' Series, and the fourth in the in-universe chronology. It takes place in two parts, originally published as separate novellas. The second part, "The Mule," won a Retro Hugo Award in 1996. ''Foundation and Empire'' saw multiple publications—it also appeared in 1955 as Ace Double (but not actually paired with another book) D-125 under the title ''The Man Who Upset the Universe''. The stories comprising this volume were originally published in ''Astounding Magazine'' (with different titles) in 1945. ''Foundation and Empire'' was the second book in the Foundation trilogy. Decades later, Asimov wrote two further sequel novels and two prequels. Later writers have added authorized, and unauthorized, tales to the series. Plot summary The General The first half of the book, titled "The General," focuses on Genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toise
A toise (; symbol: T) is a unit of measure for length, area and volume originating in pre-revolutionary France. In North America, it was used in colonial French establishments in early New France, French Louisiana (''Louisiane''), Acadia (''Acadie'') and Quebec. The related () was used in Portugal, Brazil, and other parts of the Portuguese Empire until the adoption of the metric system. Definition Unit of length * 1 toise was divided in 6 feet (french: pieds) or 72 inches () or 864 lines () in France until 1812. : In 1799 the metre was defined to be exactly 443.296 or toise, with the intention that the metre should equal of the distance from the pole to the equator. This had the effect of making the toise approximately 1949.03631 mm. : According to an article written in 1866, during measurement of various standard length artefacts from several countries, the toise was measured as 1,949.03632 mm. :Since before 1394, the standard for the toise of Paris was an iron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comité International Des Poids Et Mesures
The General Conference on Weights and Measures (GCWM; french: Conférence générale des poids et mesures, CGPM) is the supreme authority of the International Bureau of Weights and Measures (BIPM), the intergovernmental organization established in 1875 under the terms of the Metre Convention through which member states act together on matters related to measurement science and measurement standards. The CGPM is made up of delegates of the governments of the member states and observers from the Associates of the CGPM. Under its authority, the International Committee for Weights and Measures (ICWM; ) executes an exclusive direction and supervision of the BIPM. Initially the Metre Convention was only concerned with the kilogram and the metre, but in 1921 the scope of the treaty was extended to accommodate all physical measurements and hence all aspects of the metric system. In 1960 the 11th CGPM approved the International System of Units, usually known as "SI". The General Confer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
