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Topic: SI supplementary unit

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	file_nav_name Encyclopedia Index
		Lak Si (Thai à¸«à¸¥à¸±à¸à¸ªà¸µà¹) is one of the 50 districts (Khet) of Bangkok, Thailand.
		Si Sa Ket (Thai à¸¨à¸£à¸µà¸ªà¸°à¹à¸à¸©) is one of the north-eastern provinces (changwat) of Thailand.
		Amphoe Si Racha is a district in the province Chonburi, Thailand.
	www.brainyencyclopedia.com /topics/si.html (8561 words)

	NationMaster - Encyclopedia: Radian
		The angle subtended at the center of a circle by an arc of circumference equal in length to the radius of the circle is one radian.
		It is the SI derived unit of angle.
		It is defined as the angle subtended at the center of a circle by an arc of circumference equal in length to the radius of the circle.
	www.nationmaster.com /encyclopedia/Radian (1932 words)

	IAU Website: Units
		SI units are now used to a varying extent in all countries and disciplines, and this system is taught in almost all schools, colleges and universities.
		The symbol for the astronomical unit of length is au; the astronomical unit of time is 1 day (d) of 86 400 SI seconds (s); the astronomical unit of mass is equal to the mass of the Sun and is often denoted by Mo, but the special subscript makes this symbol inconvenient for general use.
		In particular, wavelengths should be expressed in metres with the appropriate SI prefix; e.g., for wavelengths in the visual range the nanometre (nm) should be used instead of the angstrom (A), which is a source of confusion in comparisons with longer and shorter wavelengths expressed in recognised SI units.
	www.iau.org /Units.234.0.html (1578 words)

	steradian
		The steradian (ste from Greek stereos, solid) is the SI derived unit of solid angle, and the 3-dimensional equivalent of the radian.
		The steradian is defined as "the solid angle subtended at the center of a sphere of radius r by a portion of the surface of the sphere having an area r
		The steradian was formerly an SI supplementary unit, but this category was abolished from the SI system in 1995.
	www.abacci.com /wikipedia/topic.aspx?cur_title=steradian (217 words)

	Radian - Wikipedia, the free encyclopedia
		The radian (symbol: rad) is the SI unit of plane angle.
		The angle subtended at the center of a circle by an arc of circumference equal in length to the radius of the circle is one radian.
		The radian was formerly an SI supplementary unit, but this category was abolished from the SI system in 1995.
	en.wikipedia.org /wiki/Radian (352 words)

	Units and Measurements (Site not responding. Last check: 2007-10-12)
		The act of comparing a physical quantity to a unit is called measurement and the measure of a particular physical quantity is the ratio of that physical quantity to the unit.
		However, the units of plane angle, radian, and solid angle, steradian, are called supplementary units.
		SI units are widely accepted and are established by law in most countries.
	www.physchem.co.za /Basic%20Skills/Units.htm (1179 words)

	Math Forum - Ask Dr. Math (Site not responding. Last check: 2007-10-12)
		Units are simply a standard measure of some parameter, which tell you what you are dealing with, whether it is length, mass, angle or whatever.
		An angle of one radian (1 rad) causes the ratio of the length of the arc of the circle's circumference to the radius of the circle to be one.
		Introduction to the Aerodynamics of Flight http://history.nasa.gov/SP-367/appendb.htm The measure of the central angle of a circle is defined as the ratio of the subtended arc of the circle divided by the radius, that is, a ratio of two lengths.
	www.mathforum.org /library/drmath/view/64034.html (1273 words)

	Steradian Encyclopedia (Site not responding. Last check: 2007-10-12)
		A steradian is also equal to the spherical area of a polygon having an angle excess of 1 radian, to 1/4π of a complete sphere, or to (180/π)² or 3282.80635 square degrees.
		The steradian was formerly an SI supplementary unit, but this category was abolished from the SI in 1995 and the steradian is now considered an SI derived unit.
		The supplementary SI unit of solid angle equal to the solid angle that encloses a surface on a sphere equal to the square of the radius of the sphere.
	www.hallencyclopedia.com /Steradian (479 words)

	Measures and Unit API Reference Documentation
		There are two units in the supplementary class: the radian (or SI unit of the quantity plane angle); and the steradian (or the SI unit of the quantity solid angle).
		Derived units are expressed algebraically in terms of base units or other derived units (including the radian and steradian which are the two supplementary units.) The SI derived units for these derived quantities are obtained from these equations and the seven SI base units.
		SI units may be combined with SI prefixes that are used to form decimal multiples and submultiples of SI units.
	www.isd.mel.nist.gov /projects/teamapi/Software/MeasuresAndUnits/MeasuresandUnitIntroduction.html (949 words)

	The laws list: S
		The fundamental SI unit of time, defined as the period of time equal to the duration of 9 192 631 770 periods of the radiation corresponding to the transition between two hyperfine levels of the ground state of the cesium-133 atom.
		The derived SI unit of dose equivalent, defined as the absorbed dose of ionizing radiation multiplied by internationally-agreed-upon dimensionless weights, since different types of ionizing radiation cause different types of damage in living tissue.
		The supplementary SI unit of solid angle defined as the solid central angle of a sphere that encloses a surface on the sphere equal to the square of the sphere's radius.
	www.alcyone.com /max/physics/laws/s.html (993 words)

	Radian -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-12)
		In (A science (or group of related sciences) dealing with the logic of quantity and shape and arrangement) mathematics and (The science of matter and energy and their interactions) physics, the radian is a unit of angle measure.
		It is defined as the angle subtended at the center of a (Ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point) circle by an arc of circumference equal in length to the radius of the circle.
		If had units, then the sum would be meaningless; the linear term can not be added to the cubic term, etc. Therefore, must be dimensionless.
	www.absoluteastronomy.com /encyclopedia/r/ra/radian.htm (357 words)

	Steradian - Wikipedia, the free encyclopedia
		The steradian (symbol: sr) is the SI unit of solid angle.
		In practice, the symbol sr is used where appropriate, but the derived unit "1" is generally omitted in combination with a numerical value.
		The steradian was formerly an SI supplementary unit, but this category was abolished from the SI in 1995.
	www.wikipedia.org /wiki/Steradian (218 words)

	si
		The units of the SI system are decided by international conferences organised by the Bureau International des Poids et Mesures (International Office of Weights and Measures).
		SI also defines a number of SI prefixes to be used with the units: these combine with any unit name to give subdivisions and multiples.
		This means that the symbol for the SI unit for pressure, named for Blaise Pascal, is Pa, whereas the unit itself is written pascal.
	www.fact-library.com /si.html (645 words)

	EMBO reports
		Supplementary information is peer-reviewed material that is directly relevant to an article but cannot be included in the printed version owing to space or format constraints.
		Supplementary information must be supplied to the Editorial Office for peer review alongside the original manuscript and the final version must be submitted with the final version of the accepted paper.
		Supplementary information describing the results of microarray studies or similar large-scale expression experiments should be deposited in either the GEO or ArrayExpress database prior to submission of the paper and must be publicly available at the time of acceptance.
	www.nature.com /embor/authors/scientific_reports.html (4385 words)

	SI supplementary unit
		Abacci > Abaccipedia > SI > SI supplementary unit
		SI (International System of Units) supplementary units were:
		As of October 1995, the category of "supplementary units" has been abolished from the SI system of measurement, and the radian and the steradian are now considered SI derived units.
	www.abacci.com /wikipedia/topic.aspx?cur_title=SI_supplementary_unit (80 words)

	BIPM - Resolution 12 of the 11th CGPM
		The name and symbol for the unit of thermodynamic temperature were modified by the 13th CGPM in 1967 (Resolution 3).
		A seventh base unit, the mole, was adopted by the 14th CGPM in 1971 (Resolution 3).
		The 20th CGPM in 1995 abrogated the class of supplementary units in the SI (Resolution 8).
	www.bipm.fr /jsp/en/ViewCGPMResolution.jsp?YEAR=1960&CGPM=11&RES=12 (371 words)

	Measurement (Site not responding. Last check: 2007-10-12)
		The unit of luminous intensity, the candela, is defined as 1/60 of the light radiated from a square centimetre of a flbody, a perfect radiator that absorbs no light, held at the temperature of freezing platinum.
		The elementary unit must be specified and may be an atom, a molecule, an ion, an electron, a photon etc., or a given group of such entities.
		Note that all units and prefixes are written in lower case, even the ones that bear the names of scientists; such as newton, joule, farad and pascal.
	www.swin.edu.au /tafe/eis/indsci/wakeup/forensic/unit3/Measurmt.htm (1145 words)

	Units of Measurement and SI Base Units
		SI is a coherent system based on the seven independent physical quantities (base units) and derived quantities (derived units).
		The unit kelvin and its symbol K should be used to express both thermodynamic temperature and an interval or a difference of temperature.
		The unit 'degree Celsius' is equal to the unit 'kelvin', and a temperature interval or a difference of temperature may also be expressed in degrees Celsius.
	www.gordonengland.co.uk /conversion/sibase.htm (798 words)

	NuSTAR: Glossary
		The fundamental SI unit of length, defined as the length of the path traveled by light in vacuum during a period of 1/299,792,458 s.
		A unit of length equal to one billionth of a meter.
		The supplementary SI unit of angular measure, defined as the central angle of a circle whose subtended arc is equal to the radius of the circle.
	epo.sonoma.edu /nustar/glossary.html (3046 words)

	Singapore Science Centre: ScienceNet\|Computer Science / IT / Mathematics\|Mathematics/ Algorithms
		The radian is the SI derived unit of angle.
		It is defined as the angle subtended at the centre of a circle by an arc of circumference equal in length to the radius of the circle.
		The definitions of the supplementary units - radian and steradian - are gratuitous.
	www.science.edu.sg /ssc/detailed.jsp?artid=5981&type=6&root=1&parent=1&cat=12 (534 words)

	ScienceMaster - Physical Science - Glossary of Space Science Terms
		The fundamental SI unit of length, defined as the length of the path traveled by light in vacuum during a period of 1/299 792 458 s.
		The fundamental SI unit of time, defined as the period of time equal to the duration of 9,192,631,770 periods of the radiation corresponding to the transition between two hyperfine levels of the ground state of the cesium-133 atom.
		The fundamental SI unit of length is the meter, of time is the second, and of mass is the kilogram.
	www.sciencemaster.com /physical/item/space_science_glossary.php (9464 words)

	SI supplementary unit -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-12)
		Until 1995, (A tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors) SI (International System of Units) supplementary units were:
		(The unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees)) radian
		As of October 1995, the category of "supplementary units" has been abolished from the SI system of measurement, and the radian and the steradian are now considered (Click link for more info and facts about SI derived unit) SI derived units.
	www.absoluteastronomy.com /encyclopedia/s/si/si_supplementary_unit1.htm (155 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		Derived from the eighteenth century metric system, Systeme International d'Unites (abbreviated to SI in all languages), supersedes the metric system in scientific and technical usage, by providing seven coherent units as standards applicable to all disciplines, rather than relying on physical artifacts as a basis of measurement.
		For example, the unit of velocity is the metre (meter) per second, which is equal to 1 metre (meter) / 1 second.
		For example, in the SI system (which is coherent), the unit of velocity is the metre (meter) per second, which is equal to 1 metre (meter) / 1 second.
	unicon.netian.com /unitsys_e.html (1487 words)

	Magnetic iron oxide, process for its production and the use thereof - Patent 6143194
		Here the Si component is added to the iron(II) sulphate, which leads to precipitations of silica and consequently to an uneven distribution of the Si in the magnetite lattice.
		The supplementary compounds are preferably added into an aqueous dispersion of the magnetic iron oxide according to the invention.
		To achieve the required triboelectric charge, the supplementary compound may, depending on the nature of the additive, be added to the Fe(II) component during the precipitation or to the finally washed magnetite suspension.
	www.freepatentsonline.com /6143194.html (2729 words)

	BLS Glossary
		Included are persons 16 years of age and older residing in the 50 States and the District of Columbia who are not inmates of institutions (for example, penal and mental facilities, homes for the aged), and who are not on active duty in the Armed Forces.
		One of nine geographic areas of the United States defined by the Census Bureau and widely used by BLS for presenting regional data.
		Unit value indexes are calculated by dividing the total value of goods in a commodity area by the total quantity of goods in that commodity area.
	www.bls.gov /bls/glossary.htm (8534 words)

	NIST Guide to SI Units - Appendix A. Definitions of the SI Base Units and the Radian and Steradian (Site not responding. Last check: 2007-10-12)
		[3]; the definitions of the SI supplementary units, the radian and steradian, which are now interpreted as SI derived units (see Sec.
		The kilogram is the unit of mass; it is equal to the mass of the international prototype of the kilogram.
		The steradian is the solid angle that, having its vertex in the center of a sphere, cuts off an area of the surface of the sphere equal to that of a square with sides of length equal to the radius of the sphere.
	physics.nist.gov /Pubs/SP811/appenA.html (414 words)

	The SI Library of Unit-Based Computation
		All the base and composite units specified by SI are provided as well, as are forms of the mandated prefixes for describing multiples and sub-multiples of the units.
		The memory requirement for each object of an si type is exactly the same memory amount that would be required for an object of the underlying native type.
		Units preceded by an asterisk are fundamental to SI.
	home.fnal.gov /~wb/units.html (4413 words)

	BIPM - SI derived and supplementary units
		Appendix 1 > SI derived and supplementary units
		Decisions relating to the base units of the SI
		Decisions concerning terminology and the acceptance of units for use with the SI
	www.bipm.net /en/si/si_brochure/appendix1/derived_and_supplementary.html (148 words)

	eFunda: SI Base Units
		The SI was established in 1960 by the 11th General Conference on Weights and Measures (CGPM).
		The CGPM is the international authority that ensures wide dissemination of the SI and modifies the SI as necessary to reflect the latest advances in science and technology.
		These are non-dimensional units that are sometimes included in the dimensional expression of a unit for clarity purposes.
	www.efunda.com /units/si_base_units.cfm (373 words)

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