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SI (other)
The International System of Units
International System of Units
(SI, abbreviated from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement. It comprises a coherent system of units of measurement built on seven base units, which are the ampere, kelvin, second, metre, kilogram, candela, mole, and a set of twenty prefixes to the unit names and unit symbols that may be used when specifying multiples and fractions of the units. The system also specifies names for 22 derived units, such as lumen and watt, for other common physical quantities. The base units are derived from invariant constants of nature, such as the speed of light in vacuum and the triple point of water, which can be observed and measured with great accuracy, and one physical artefact
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SI (other)
Si, SI or si may refer to:Contents1 Arts and media1.1 Music 1.2 Publications2 Organisations2.1 Education 2.2 Government 2.3 Computing 2.4 Politics3 Places 4 Science and technology4.1 Biology and medicine 4.2 Computing and Internet 4.3 Vehicles5 Titles and ranks 6 Other uses 7 See alsoArts and media[edit]Si (film), original title of the 2010 South Korean film Poetry Si, a self-replicating artifact in the computer game Ancient Domains of MysteryMusic[edit]Si (musical note), the seventh note in the traditional fixed do solfège Sì (operetta), an operetta by the Italian composer Pietro Mascagni "Sì" (song), the name of the Italian entry to the Eurovision Song Contest 1974 "Sì", a 1985 song released by Italian actress Carmen Russo Sí (album), a Spanish album by Mexican singer and songwriter Julieta Venegas Sí, Spanish album by
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Metrication In The United Kingdom
Metrication
Metrication
in the United Kingdom, the process of introducing the metric system of measurement in place of imperial units, has made steady progress since the mid–20th century but today remains equivocal and varies by context. Most of government, industry and commerce use metric units, but imperial units are officially used to specify journey distances, vehicle speeds and the sizes of returnable milk containers, beer and cider glasses (though fresh milk is often still sold in multiples of pints, with the metric equivalent also marked). Imperial units
Imperial units
are also often used to describe body measurements and vehicle fuel economy
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Discipline (academia)
An academic discipline or academic field is a branch of knowledge. It incorporates expertise, people, projects, communities, challenges, studies, inquiry, and research areas that are strongly associated with a given scholastic subject area or college department. For example, the branches of science are commonly referred to as the scientific disciplines, e.g. physics, mathematics, and biology. Individuals associated with academic disciplines are commonly referred to as experts or specialists
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General Conference On Weights And Measures
The General Conference on Weights and Measures (French: Conférence générale des poids et mesures – CGPM) is the senior of the three Inter-governmental organizations
Inter-governmental organizations
established in 1875 under the terms of the Metre Convention
Metre Convention
(French: Convention du Mètre) to represent the interests of member states. The treaty, which also set up two further bodies, the International Committee for Weights and Measures (French: Comité international des poids et mesures – CIPM) and the International Bureau of Weights and Measures
International Bureau of Weights and Measures
(French: Bureau international des poids et mesures – BIPM), was drawn up to coordinate international metrology and to coordinate the development of the metric system. The conference meets in Sèvres
Sèvres
(south-west of Paris) every four to six years
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Metre Convention
The Metre
Metre
Convention (French: Convention du Mètre), also known as the Treaty of the Metre,[1] is an international treaty that was signed in Paris
Paris
on 20 May 1875 by representatives of 17 nations. (Argentina, Austria-Hungary, Belgium, Brazil, Denmark, France, Germany, Italy, Peru, Portugal, Russia, Spain, Sweden
Sweden
and Norway, Switzerland, Turkey, United States
United States
of America, and Venezuela). The treaty set up an institute for the purpose of coordinating international metrology and for coordinating the development of the metric system. The treaty also set up associated organizations to oversee the running of the institute. Initially it was only concerned with the units of mass and length but, in 1921, at the 6th meeting of the General Conference on Weights and Measures (CGPM), it was revised and its mandate extended to cover all physical measurements
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MKS System Of Units
The MKS system of units is a physical system of units that expresses any given measurement using base units of the metre, kilogram, and/or second (MKS). Historically the use of the MKS system of units succeeded the centimetre–gram–second system of units (CGS) in commerce and engineering, (1889). The metre and kilogram system served as the basis for the development of the International System of Units, which now serves as the international standard. Because of this, the standards of the CGS system were gradually replaced with metric standards incorporated from the MKS system.[1] The exact list of units used in the MKS system changed over time. It incorporated base units other than the metre, kilogram, and second in addition to derived units. An incomplete list of the base and derived units appears below
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Metrication
Metrication
Metrication
or metrification is conversion to the metric system of units of measurement.[2] Worldwide, there has been a long process of independent conversions of countries from various local and traditional systems, beginning in France
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Countries
A country is a region that is identified as a distinct national entity in political geography. A country may be an independent sovereign state or one that is occupied by another state, as a non-sovereign or formerly sovereign political division, or a geographic region associated with sets of previously independent or differently associated people with distinct political characteristics
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United States
Coordinates: 40°N 100°W / 40°N 100°W / 40; -100 United States
United States
of America Flag Coat of arms Motto: "In God
God
We Trust"[1][a] .mw-parser-ou
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Liberia
Coordinates: 6°30′N 9°30′W / 6.500°N 9.500°W / 6.500; -9.500Republic of LiberiaFlagCoat of armsMotto: "The Love Of Liberty Brought Us Here"Anthem: All Hail, Liberia, Hail!Location of  Liberia  (dark blue) – in Africa  (light blue & dark grey) – in the African Union  (light blue)Capital and largest city Monrovia 6°19′N 10°48′W / 6.317°N 10.800°W / 6.317; -10.800Official languages EnglishSpoken and national languages[1]Liberian EnglishEthnic groups (2008[2])20.3% Kpelle 13.4% Bassa 10.6% Americo-Liberian 10.0% Grebo 8.0% Gio 7.9% Mano 6.0% Kru 5.1% Lorma 4.8% Kissi 4.4% GolaReligion85.6% Christianity 12.2% Islam 2.2% others[2]Demonym LiberianGovernment Unitary presidential republic• PresidentGeorge Weah• Vice PresidentJewel Ta
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Myanmar
Myanmar
Myanmar
(Burmese: [mjəmà]),[nb 1][8] officially the Republic
Republic
of the Union of Myanmar
Myanmar
and also known as Burma, is a sovereign state in Southeast Asia. Myanmar
Myanmar
is bordered by India
India
and Bangladesh
Bangladesh
to its west, Thailand
Thailand
and Laos
Laos
to its east and China
China
to its north and northeast. To its south, about one third of Myanmar's total perimeter of 5,876 km (3,651 mi) forms an uninterrupted coastline of 1,930 km (1,200 mi) along the Bay of Bengal
Bay of Bengal
and the Andaman Sea. The country's 2014 census counted the population to be 51 million people.[9] As of 2017, the population is about 54 million.[5] Myanmar is 676,578 square kilometres (261,228 square miles) in size
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Metrication In Canada
Metrication
Metrication
in Canada
Canada
began in 1970 and while Canada
Canada
has converted to the metric system for many purposes, there is still significant use of non-metric units and standards in many sectors of the Canadian economy
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SI Prefix
A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or fraction of the unit. While all metric prefixes in common use today are decadic, historically there have been a number of binary metric prefixes as well.[1] Each prefix has a unique symbol that is prepended to the 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
Decimal
multiplicative prefixes have been a feature of all forms of the metric system, with six dating back to the system's introduction in the 1790s. Metric prefixes have even been prepended to non-metric units
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Electrostatic Units
The electrostatic system of units (ESU) is a system of units used to measure quantities of electric charge, electric current, and voltage within the centimeter-gram-second (or "CGS") system of metric units. In electrostatic units, electrical charge is defined by the force that it exerts on other charges.[1][2] Although the CGS units have mostly been supplanted by the MKSA (meter-kilogram-second-ampere) or International System of Units
International System of Units
(SI) units, the electrostatic units are still in occasional use in some applications, most notably in certain fields of physics such as in particle physics and astrophysics. The main electrostatic units are:The statcoulomb, called the Franklin or the "esu" for electric charge. The statvolt for voltage. The gauss for magnetic induction.External links[edit]Electrical units^ "Electrostatic unit of charge unit of measurement". Encyclopedia Britannica. Retrieved 2018-03-27.  ^ Clarke, Richard
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Coherent System Of Units
A coherent system of units is a system of units based on a system of quantities in such a way that the equations between the numerical values expressed in the units of the system have exactly the same form, including numerical factors, as the corresponding equations between the quantities.[1][2] Equivalently, it is a system in which every quantity has a unique unit, or one that does not use conversion factors. A coherent derived unit is a derived unit that, for a given system of quantities and for a chosen set of base units, is a product of powers of base units with the proportionality factor being one.[1] If a system of units has both equations and base units, with only one base unit for each base quantity, then it is coherent if and only if every derived unit of the system is coherent. The concept of coherence was developed in the mid-nineteenth century by, amongst others, Kelvin and
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