Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Download
Faster access than browser!
 

International System of Units

Index International System of Units

The 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. [1]

240 relations: Absorbed dose, Acceleration, American English, Amount of substance, Ampere, Anders Celsius, Angle, Archives Nationales (France), Area, Astronomical unit, Atmospheric pressure, Atom, Avogadro constant, Bar (unit), Barn (unit), Barye, Becquerel, Blaise Pascal, Blood pressure, Boiling point, Boltzmann constant, British English, British Science Association, Cambridge University Press, Candela, Capacitance, Carbon-12, Carcel lamp, Carl Friedrich Gauss, Catalysis, Celsius, Centimetre–gram–second system of units, Coherence (units of measurement), Comma, Commission on Isotopic Abundances and Atomic Weights, Conventional electrical unit, Coordinated Universal Time, Coulomb, Country, Curie, Darcy (unit), Day, Decibel, Decimal separator, Degree (angle), Dimensional analysis, Discipline (academia), Dyne, Electric charge, Electric current, ..., Electric potential, Electrical impedance, Electrical reactance, Electrical resistance and conductance, Electromagnetic radiation, Electromotive force, Electron, Electronvolt, Electrostatic units, Elementary charge, Encyclopedia.com, Energy, Ephemeris time, Equivalent dose, Erg, Etymology of electricity, Exponentiation, Farad, Foot (unit), Force, French Academy of Sciences, French language, Frequency, Full stop, Gabriel Mouton, Gal (unit), Gauss (unit), General Conference on Weights and Measures, Geodesy, Geophysics, German language, Giovanni Giorgi, Gram, Grave (unit), Gray (unit), Ground state, Health care, Heat, Hectare, Henry (unit), Hertz, History of the metre, Horsepower, Hour, Hyperfine structure, Illuminance, Inductance, Institute for Reference Materials and Measurements, International Bureau of Weights and Measures, International Committee for Weights and Measures, International Electrotechnical Commission, International Organization for Standardization, International System of Quantities, Introduction to the metric system, Ion, Ionizing radiation, Iridium, ISO 80000-1, ISO/IEC 80000, Isotopes of caesium, Isotopes of krypton, James Clerk Maxwell, Jean-Pierre Christin, John Wilkins, Joint Committee for Guides in Metrology, Joule, Katal, Kelvin, Kibble balance, Kilogram, Knot (unit), Latin America, Length, Letter case, Liberia, List of international common standards, List of sovereign states and dependent territories in Europe, Litre, Long and short scales, Lumen (unit), Luminous flux, Luminous intensity, Lux, Magnetic field, Magnetic flux, Mass, Mathematician, Maxwell (unit), Melting point, Meridian (geography), Metre, Metre Convention, Metre per second squared, Metre–tonne–second system of units, Metric prefix, Metric system, Metrication, Metrology, Millimeter of mercury, Minute, Minute and second of arc, MKS system of units, Mole (unit), Molecular mass, Molecule, Multiplication, Myanmar, National Institute of Standards and Technology, Nautical mile, Navigation, Neper, Newton (unit), Newton's laws of motion, Non-SI units mentioned in the SI, Oersted, Ohm, Outline of the metric system, Oxford University Press, Pascal (unit), Permeability (earth sciences), Phot, Physical quantity, Physikalisch-Technische Bundesanstalt, Planck constant, Platinum, Platinum-iridium alloy, Poise (unit), Pound (mass), Power (physics), Pressure, Printing press, Proper noun, Properties of water, Proposed redefinition of SI base units, Radian, Radiant flux, Radioactive decay, Radionuclide, Rapeseed, Relative change and difference, Sèvres, Second, SI base unit, SI derived unit, Siemens (unit), Sievert, Slash (punctuation), Solid angle, Speed of light, Spermaceti, Standard (metrology), Standard gravity, Steradian, Stilb (unit), Stress (mechanics), Symbol, System of measurement, Technical standard, Temperature, Temperature measurement, Tesla (unit), Thermodynamic temperature, Time, Tonne, Torque, Triple point, Tropical year, Typewriter, Unified atomic mass unit, Unified Code for Units of Measure, Unit of measurement, United States, University of Edinburgh, University of North Carolina, Vacuum, Velocity, Viscosity, Volt, Voltage, Washington, D.C., Watt, Wavelength, Weber (unit), Weight, Wilhelm Eduard Weber, William Thomson, 1st Baron Kelvin, Word processor, Work (physics), World War II, Yale University Press. Expand index (190 more) »

Absorbed dose

Absorbed dose is a measure of the energy deposited in a medium by ionizing radiation.

New!!: International System of Units and Absorbed dose · See more »

Acceleration

In physics, acceleration is the rate of change of velocity of an object with respect to time.

New!!: International System of Units and Acceleration · See more »

American English

American English (AmE, AE, AmEng, USEng, en-US), sometimes called United States English or U.S. English, is the set of varieties of the English language native to the United States.

New!!: International System of Units and American English · See more »

Amount of substance

Amount of substance (symbol for the quantity is 'n') is a standard-defined quantity that measures the size of an ensemble of elementary entities, such as atoms, molecules, electrons, and other particles.

New!!: International System of Units and Amount of substance · See more »

Ampere

The ampere (symbol: A), often shortened to "amp",SI supports only the use of symbols and deprecates the use of abbreviations for units.

New!!: International System of Units and Ampere · See more »

Anders Celsius

Anders Celsius (27 November 170125 April 1744) was a Swedish astronomer, physicist and mathematician.

New!!: International System of Units and Anders Celsius · See more »

Angle

In plane geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

New!!: International System of Units and Angle · See more »

Archives Nationales (France)

The Archives Nationales (Archives nationales de France), also known as the French Archives or the National Archives, preserve France's official archives apart from the archives of the Ministry of Defence and the Ministry of Foreign Affairs, as these two ministries have their own archive services, the Defence Historical Service (Service historique de la défense) and the Diplomatic Archives (Archives diplomatiques) respectively.

New!!: International System of Units and Archives Nationales (France) · See more »

Area

Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane.

New!!: International System of Units and Area · See more »

Astronomical unit

The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.

New!!: International System of Units and Astronomical unit · See more »

Atmospheric pressure

Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet).

New!!: International System of Units and Atmospheric pressure · See more »

Atom

An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.

New!!: International System of Units and Atom · See more »

Avogadro constant

In chemistry and physics, the Avogadro constant (named after scientist Amedeo Avogadro) is the number of constituent particles, usually atoms or molecules, that are contained in the amount of substance given by one mole.

New!!: International System of Units and Avogadro constant · See more »

Bar (unit)

The bar is a metric unit of pressure, but is not approved as part of the International System of Units (SI).

New!!: International System of Units and Bar (unit) · See more »

Barn (unit)

A barn (symbol: b) is a unit of area equal to 10−28 m2 (100 fm2).

New!!: International System of Units and Barn (unit) · See more »

Barye

The barye (symbol: Ba), or sometimes barad, barrie, bary, baryd, baryed, or barie, is the centimetre–gram–second (CGS) unit of pressure.

New!!: International System of Units and Barye · See more »

Becquerel

The becquerel (symbol: Bq) is the SI derived unit of radioactivity.

New!!: International System of Units and Becquerel · See more »

Blaise Pascal

Blaise Pascal (19 June 1623 – 19 August 1662) was a French mathematician, physicist, inventor, writer and Catholic theologian.

New!!: International System of Units and Blaise Pascal · See more »

Blood pressure

Blood pressure (BP) is the pressure of circulating blood on the walls of blood vessels.

New!!: International System of Units and Blood pressure · See more »

Boiling point

The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid and the liquid changes into a vapor.

New!!: International System of Units and Boiling point · See more »

Boltzmann constant

The Boltzmann constant, which is named after Ludwig Boltzmann, is a physical constant relating the average kinetic energy of particles in a gas with the temperature of the gas.

New!!: International System of Units and Boltzmann constant · See more »

British English

British English is the standard dialect of English language as spoken and written in the United Kingdom.

New!!: International System of Units and British English · See more »

British Science Association

The British Science Association (BSA) is a charity and learned society founded in 1831 to aid in the promotion and development of science.

New!!: International System of Units and British Science Association · See more »

Cambridge University Press

Cambridge University Press (CUP) is the publishing business of the University of Cambridge.

New!!: International System of Units and Cambridge University Press · See more »

Candela

The candela (or; symbol: cd) is the base unit of luminous intensity in the International System of Units (SI); that is, luminous power per unit solid angle emitted by a point light source in a particular direction.

New!!: International System of Units and Candela · See more »

Capacitance

Capacitance is the ratio of the change in an electric charge in a system to the corresponding change in its electric potential.

New!!: International System of Units and Capacitance · See more »

Carbon-12

Carbon-12 is the more abundant of the two stable isotopes of carbon (Carbon-13 being the other), amounting to 98.93% of the element carbon; its abundance is due to the triple-alpha process by which it is created in stars.

New!!: International System of Units and Carbon-12 · See more »

Carcel lamp

The Carcel lamp was an efficient lighting device used in the nineteenth century for domestic purposes and in France as the standard measure for illumination.

New!!: International System of Units and Carcel lamp · See more »

Carl Friedrich Gauss

Johann Carl Friedrich Gauss (Gauß; Carolus Fridericus Gauss; 30 April 177723 February 1855) was a German mathematician and physicist who made significant contributions to many fields, including algebra, analysis, astronomy, differential geometry, electrostatics, geodesy, geophysics, magnetic fields, matrix theory, mechanics, number theory, optics and statistics.

New!!: International System of Units and Carl Friedrich Gauss · See more »

Catalysis

Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalysthttp://goldbook.iupac.org/C00876.html, which is not consumed in the catalyzed reaction and can continue to act repeatedly.

New!!: International System of Units and Catalysis · See more »

Celsius

The Celsius scale, previously known as the centigrade scale, is a temperature scale used by the International System of Units (SI).

New!!: International System of Units and Celsius · See more »

Centimetre–gram–second system of units

The centimetre–gram–second system of units (abbreviated CGS or cgs) is a variant of the metric system based on the centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time.

New!!: International System of Units and Centimetre–gram–second system of units · See more »

Coherence (units of measurement)

A coherent system of units is based on a system of quantities in such a way that the equations between the numerical values expressed in coherent units have exactly the same form, including numerical factors, as the corresponding equations between the quantities.

New!!: International System of Units and Coherence (units of measurement) · See more »

Comma

The comma is a punctuation mark that appears in several variants in different languages.

New!!: International System of Units and Comma · See more »

Commission on Isotopic Abundances and Atomic Weights

The Commission on Isotopic Abundances and Atomic Weights (CIAAW) is an international scientific committee of the International Union of Pure and Applied Chemistry (IUPAC) under its Division of Inorganic Chemistry.

New!!: International System of Units and Commission on Isotopic Abundances and Atomic Weights · See more »

Conventional electrical unit

A conventional electrical unit (or conventional unit where there is no risk of ambiguity) is a unit of measurement in the field of electricity which is based on the so-called "conventional values" of the Josephson constant and the von Klitzing constant agreed by the International Committee for Weights and Measures (CIPM) in 1988.

New!!: International System of Units and Conventional electrical unit · See more »

Coordinated Universal Time

No description.

New!!: International System of Units and Coordinated Universal Time · See more »

Coulomb

The coulomb (symbol: C) is the International System of Units (SI) unit of electric charge.

New!!: International System of Units and Coulomb · See more »

Country

A country is a region that is identified as a distinct national entity in political geography.

New!!: International System of Units and Country · See more »

Curie

The curie (symbol Ci) is a non-SI unit of radioactivity originally defined in 1910.

New!!: International System of Units and Curie · See more »

Darcy (unit)

A darcy (or darcy unit) and millidarcy (md or mD) are units of permeability, named after Henry Darcy.

New!!: International System of Units and Darcy (unit) · See more »

Day

A day, a unit of time, is approximately the period of time during which the Earth completes one rotation with respect to the Sun (solar day).

New!!: International System of Units and Day · See more »

Decibel

The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale.

New!!: International System of Units and Decibel · See more »

Decimal separator

A decimal separator is a symbol used to separate the integer part from the fractional part of a number written in decimal form.

New!!: International System of Units and Decimal separator · See more »

Degree (angle)

A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.

New!!: International System of Units and Degree (angle) · See more »

Dimensional analysis

In engineering and science, dimensional analysis is the analysis of the relationships between different physical quantities by identifying their base quantities (such as length, mass, time, and electric charge) and units of measure (such as miles vs. kilometers, or pounds vs. kilograms) and tracking these dimensions as calculations or comparisons are performed.

New!!: International System of Units and Dimensional analysis · See more »

Discipline (academia)

An academic discipline or academic field is a branch of knowledge.

New!!: International System of Units and Discipline (academia) · See more »

Dyne

The dyne (symbol dyn, from Greek δύναμις, dynamis, meaning power, force) is a derived unit of force specified in the centimetre–gram–second (CGS) system of units, a predecessor of the modern SI.

New!!: International System of Units and Dyne · See more »

Electric charge

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.

New!!: International System of Units and Electric charge · See more »

Electric current

An electric current is a flow of electric charge.

New!!: International System of Units and Electric current · See more »

Electric potential

An electric potential (also called the electric field potential, potential drop or the electrostatic potential) is the amount of work needed to move a unit positive charge from a reference point to a specific point inside the field without producing any acceleration.

New!!: International System of Units and Electric potential · See more »

Electrical impedance

Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.

New!!: International System of Units and Electrical impedance · See more »

Electrical reactance

In electrical and electronic systems, reactance is the opposition of a circuit element to a change in current or voltage, due to that element's inductance or capacitance.

New!!: International System of Units and Electrical reactance · See more »

Electrical resistance and conductance

The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor.

New!!: International System of Units and Electrical resistance and conductance · See more »

Electromagnetic radiation

In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space-time, carrying electromagnetic radiant energy.

New!!: International System of Units and Electromagnetic radiation · See more »

Electromotive force

Electromotive force, abbreviated emf (denoted \mathcal and measured in volts), is the electrical intensity or "pressure" developed by a source of electrical energy such as a battery or generator.

New!!: International System of Units and Electromotive force · See more »

Electron

The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.

New!!: International System of Units and Electron · See more »

Electronvolt

In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately joules (symbol J).

New!!: International System of Units and Electronvolt · See more »

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.

New!!: International System of Units and Electrostatic units · See more »

Elementary charge

The elementary charge, usually denoted as or sometimes, is the electric charge carried by a single proton, or equivalently, the magnitude of the electric charge carried by a single electron, which has charge.

New!!: International System of Units and Elementary charge · See more »

Encyclopedia.com

Encyclopedia.com is an online encyclopedia website.

New!!: International System of Units and Encyclopedia.com · See more »

Energy

In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.

New!!: International System of Units and Energy · See more »

Ephemeris time

The term ephemeris time (often abbreviated ET) can in principle refer to time in connection with any astronomical ephemeris.

New!!: International System of Units and Ephemeris time · See more »

Equivalent dose

Equivalent dose is a dose quantity H representing the stochastic health effects of low levels of ionizing radiation on the human body.

New!!: International System of Units and Equivalent dose · See more »

Erg

The erg is a unit of energy and work equal to 10−7 joules.

New!!: International System of Units and Erg · See more »

Etymology of electricity

The New Latin adjective electricus, originally meaning 'of amber', was first used to refer to amber's attractive properties by William Gilbert in his 1600 text De Magnete.

New!!: International System of Units and Etymology of electricity · See more »

Exponentiation

Exponentiation is a mathematical operation, written as, involving two numbers, the base and the exponent.

New!!: International System of Units and Exponentiation · See more »

Farad

The farad (symbol: F) is the SI derived unit of electrical capacitance, the ability of a body to store an electrical charge.

New!!: International System of Units and Farad · See more »

Foot (unit)

The foot (feet; abbreviation: ft; symbol: ′, the prime symbol) is a unit of length in the imperial and US customary systems of measurement.

New!!: International System of Units and Foot (unit) · See more »

Force

In physics, a force is any interaction that, when unopposed, will change the motion of an object.

New!!: International System of Units and Force · See more »

French Academy of Sciences

The French Academy of Sciences (French: Académie des sciences) is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French scientific research.

New!!: International System of Units and French Academy of Sciences · See more »

French language

French (le français or la langue française) is a Romance language of the Indo-European family.

New!!: International System of Units and French language · See more »

Frequency

Frequency is the number of occurrences of a repeating event per unit of time.

New!!: International System of Units and Frequency · See more »

Full stop

The full point or full stop (British and broader Commonwealth English) or period (North American English) is a punctuation mark.

New!!: International System of Units and Full stop · See more »

Gabriel Mouton

Gabriel Mouton (1618 – 28 September 1694) was a French abbot and scientist.

New!!: International System of Units and Gabriel Mouton · See more »

Gal (unit)

The gal (symbol: Gal), sometimes called galileo after Galileo Galilei, is a unit of acceleration used extensively in the science of gravimetry.

New!!: International System of Units and Gal (unit) · See more »

Gauss (unit)

The gauss, abbreviated as G or Gs, is the cgs unit of measurement of magnetic flux density (or "magnetic induction") (B).

New!!: International System of Units and Gauss (unit) · See more »

General Conference on Weights and Measures

The General Conference on Weights and Measures (Conférence générale des poids et mesures – CGPM) is the supreme authority of the International Bureau of Weights and Measures (Bureau international des poids et mesures – BIPM), the inter-governmental organization established in 1875 under the terms of the Metre Convention (Convention du Mètre) through which Member States act together on matters related to measurement science and measurement standards.

New!!: International System of Units and General Conference on Weights and Measures · See more »

Geodesy

Geodesy, also known as geodetics, is the earth science of accurately measuring and understanding three of Earth's fundamental properties: its geometric shape, orientation in space, and gravitational field.

New!!: International System of Units and Geodesy · See more »

Geophysics

Geophysics is a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment, and the use of quantitative methods for their analysis.

New!!: International System of Units and Geophysics · See more »

German language

German (Deutsch) is a West Germanic language that is mainly spoken in Central Europe.

New!!: International System of Units and German language · See more »

Giovanni Giorgi

Giovanni Giorgi (27 November 1871 – 19 August 1950) was an Italian physicist and electrical engineer who proposed the Giorgi system of measurement, the precursor to the International System of Units (SI).

New!!: International System of Units and Giovanni Giorgi · See more »

Gram

The gram (alternative spelling: gramme; SI unit symbol: g) (Latin gramma, from Greek γράμμα, grámma) is a metric system unit of mass.

New!!: International System of Units and Gram · See more »

Grave (unit)

The grave was the original name of the kilogram, in an early version of the metric system between 1793 and 1795.

New!!: International System of Units and Grave (unit) · See more »

Gray (unit)

The gray (symbol: Gy) is a derived unit of ionizing radiation dose in the International System of Units (SI).

New!!: International System of Units and Gray (unit) · See more »

Ground state

The ground state of a quantum mechanical system is its lowest-energy state; the energy of the ground state is known as the zero-point energy of the system.

New!!: International System of Units and Ground state · See more »

Health care

Health care or healthcare is the maintenance or improvement of health via the prevention, diagnosis, and treatment of disease, illness, injury, and other physical and mental impairments in human beings.

New!!: International System of Units and Health care · See more »

Heat

In thermodynamics, heat is energy transferred from one system to another as a result of thermal interactions.

New!!: International System of Units and Heat · See more »

Hectare

The hectare (SI symbol: ha) is an SI accepted metric system unit of area equal to a square with 100 meter sides, or 10,000 m2, and is primarily used in the measurement of land.

New!!: International System of Units and Hectare · See more »

Henry (unit)

The henry (symbol: H) is the SI derived unit of electrical inductance.

New!!: International System of Units and Henry (unit) · See more »

Hertz

The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.

New!!: International System of Units and Hertz · See more »

History of the metre

In the aftermath of the French Revolution (1789), the traditional units of measure used in the Ancien Régime were replaced.

New!!: International System of Units and History of the metre · See more »

Horsepower

Horsepower (hp) is a unit of measurement of power (the rate at which work is done).

New!!: International System of Units and Horsepower · See more »

Hour

An hour (symbol: h; also abbreviated hr.) is a unit of time conventionally reckoned as of a day and scientifically reckoned as 3,599–3,601 seconds, depending on conditions.

New!!: International System of Units and Hour · See more »

Hyperfine structure

In atomic physics, hyperfine structure refers to small shifts and splittings in the energy levels of atoms, molecules and ions, due to interaction between the state of the nucleus and the state of the electron clouds.

New!!: International System of Units and Hyperfine structure · See more »

Illuminance

In photometry, illuminance is the total luminous flux incident on a surface, per unit area.

New!!: International System of Units and Illuminance · See more »

Inductance

In electromagnetism and electronics, inductance is the property of an electrical conductor by which a change in electric current through it induces an electromotive force (voltage) in the conductor.

New!!: International System of Units and Inductance · See more »

Institute for Reference Materials and Measurements

The Institute for Reference Materials and Measurements (IRMM), located in Geel, Belgium, is one of the seven institutes of the Joint Research Centre (JRC), a Directorate-General of the European Commission (EC).

New!!: International System of Units and Institute for Reference Materials and Measurements · See more »

International Bureau of Weights and Measures

The International Bureau of Weights and Measures (Bureau international des poids et mesures) is an intergovernmental organization established by the Metre Convention, through which Member States act together on matters related to measurement science and measurement standards.

New!!: International System of Units and International Bureau of Weights and Measures · See more »

International Committee for Weights and Measures

The International Committee for Weights and Measures (abbreviated CIPM from the French Comité international des poids et mesures) consists of eighteen persons, each of a different nationality, from Member States of the Metre Convention (Convention du Mètre) appointed by the General Conference on Weights and Measures (CGPM) whose principal task is to promote worldwide uniformity in units of measurement by taking direct action or by submitting proposals to the CGPM.

New!!: International System of Units and International Committee for Weights and Measures · See more »

International Electrotechnical Commission

The International Electrotechnical Commission (IEC; in French: Commission électrotechnique internationale) is an international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology".

New!!: International System of Units and International Electrotechnical Commission · See more »

International Organization for Standardization

The International Organization for Standardization (ISO) is an international standard-setting body composed of representatives from various national standards organizations.

New!!: International System of Units and International Organization for Standardization · See more »

International System of Quantities

The International System of Quantities (ISQ) is a system based on seven base quantities: length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity.

New!!: International System of Units and International System of Quantities · See more »

Introduction to the metric system

The metric system was developed during the French Revolution to replace the various measures previously used in France.

New!!: International System of Units and Introduction to the metric system · See more »

Ion

An ion is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons).

New!!: International System of Units and Ion · See more »

Ionizing radiation

Ionizing radiation (ionising radiation) is radiation that carries enough energy to liberate electrons from atoms or molecules, thereby ionizing them.

New!!: International System of Units and Ionizing radiation · See more »

Iridium

Iridium is a chemical element with symbol Ir and atomic number 77.

New!!: International System of Units and Iridium · See more »

ISO 80000-1

ISO 80000-1:2009 is a standard describing scientific and mathematical quantities and their units.

New!!: International System of Units and ISO 80000-1 · See more »

ISO/IEC 80000

ISO 80000 or IEC 80000 is an international standard promulgated jointly by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC).

New!!: International System of Units and ISO/IEC 80000 · See more »

Isotopes of caesium

Caesium (55Cs; or cesium) has 40 known isotopes, making it, along with barium and mercury, the element with the most isotopes.

New!!: International System of Units and Isotopes of caesium · See more »

Isotopes of krypton

There are 33 known isotopes of krypton (36Kr) with atomic mass numbers from 69 through 101.

New!!: International System of Units and Isotopes of krypton · See more »

James Clerk Maxwell

James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish scientist in the field of mathematical physics.

New!!: International System of Units and James Clerk Maxwell · See more »

Jean-Pierre Christin

Jean-Pierre Christin (May 31, 1683 – January 19, 1755) was a French physicist, mathematician, astronomer and musician.

New!!: International System of Units and Jean-Pierre Christin · See more »

John Wilkins

John Wilkins, (16141672) was an Anglican clergyman, natural philosopher and author, and was one of the founders of the Royal Society.

New!!: International System of Units and John Wilkins · See more »

Joint Committee for Guides in Metrology

The Joint Committee for Guides in Metrology (JCGM), is an organization in Sèvres that prepared the "Guide to the expression of uncertainty in measurement" (GUM) and the "International vocabulary of metrology – basic and general concepts and associated terms" (VIM).

New!!: International System of Units and Joint Committee for Guides in Metrology · See more »

Joule

The joule (symbol: J) is a derived unit of energy in the International System of Units.

New!!: International System of Units and Joule · See more »

Katal

The katal (symbol: kat) is the SI unit of catalytic activity.

New!!: International System of Units and Katal · See more »

Kelvin

The Kelvin scale is an absolute thermodynamic temperature scale using as its null point absolute zero, the temperature at which all thermal motion ceases in the classical description of thermodynamics.

New!!: International System of Units and Kelvin · See more »

Kibble balance

A Kibble balance (previously watt balance) is an electromechanical weight measuring instrument that measures the weight of a test object very precisely by the strength of an electric current and a voltage.

New!!: International System of Units and Kibble balance · See more »

Kilogram

The kilogram or kilogramme (symbol: kg) is the base unit of mass in the International System of Units (SI), and is defined as being equal to the mass of the International Prototype of the Kilogram (IPK, also known as "Le Grand K" or "Big K"), a cylinder of platinum-iridium alloy stored by the International Bureau of Weights and Measures at Saint-Cloud, France.

New!!: International System of Units and Kilogram · See more »

Knot (unit)

The knot is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.15078 mph).

New!!: International System of Units and Knot (unit) · See more »

Latin America

Latin America is a group of countries and dependencies in the Western Hemisphere where Spanish, French and Portuguese are spoken; it is broader than the terms Ibero-America or Hispanic America.

New!!: International System of Units and Latin America · See more »

Length

In geometric measurements, length is the most extended dimension of an object.

New!!: International System of Units and Length · See more »

Letter case

Letter case (or just case) is the distinction between the letters that are in larger upper case (also uppercase, capital letters, capitals, caps, large letters, or more formally majuscule) and smaller lower case (also lowercase, small letters, or more formally minuscule) in the written representation of certain languages.

New!!: International System of Units and Letter case · See more »

Liberia

Liberia, officially the Republic of Liberia, is a country on the West African coast.

New!!: International System of Units and Liberia · See more »

List of international common standards

A list of common and basic information standards, that are related by their frequent and widespread use, and which are conventionally used internationally by industry and organizations.

New!!: International System of Units and List of international common standards · See more »

List of sovereign states and dependent territories in Europe

The list below includes all entities falling even partially under any of the various common definitions of Europe, geographical or political.

New!!: International System of Units and List of sovereign states and dependent territories in Europe · See more »

Litre

The litre (SI spelling) or liter (American spelling) (symbols L or l, sometimes abbreviated ltr) is an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm3), 1,000 cubic centimetres (cm3) or 1/1,000 cubic metre. A cubic decimetre (or litre) occupies a volume of 10 cm×10 cm×10 cm (see figure) and is thus equal to one-thousandth of a cubic metre. The original French metric system used the litre as a base unit. The word litre is derived from an older French unit, the litron, whose name came from Greek — where it was a unit of weight, not volume — via Latin, and which equalled approximately 0.831 litres. The litre was also used in several subsequent versions of the metric system and is accepted for use with the SI,, p. 124. ("Days" and "hours" are examples of other non-SI units that SI accepts.) although not an SI unit — the SI unit of volume is the cubic metre (m3). The spelling used by the International Bureau of Weights and Measures is "litre", a spelling which is shared by almost all English-speaking countries. The spelling "liter" is predominantly used in American English. One litre of liquid water has a mass of almost exactly one kilogram, because the kilogram was originally defined in 1795 as the mass of one cubic decimetre of water at the temperature of melting ice. Subsequent redefinitions of the metre and kilogram mean that this relationship is no longer exact.

New!!: International System of Units and Litre · See more »

Long and short scales

The long and short scales are two of several large-number naming systems for integer powers of ten that use the same words with different meanings.

New!!: International System of Units and Long and short scales · See more »

Lumen (unit)

The lumen (symbol: lm) is the SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source.

New!!: International System of Units and Lumen (unit) · See more »

Luminous flux

In photometry, luminous flux or luminous power is the measure of the perceived power of light.

New!!: International System of Units and Luminous flux · See more »

Luminous intensity

In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye.

New!!: International System of Units and Luminous intensity · See more »

Lux

The lux (symbol: lx) is the SI derived unit of illuminance and luminous emittance, measuring luminous flux per unit area.

New!!: International System of Units and Lux · See more »

Magnetic field

A magnetic field is a vector field that describes the magnetic influence of electrical currents and magnetized materials.

New!!: International System of Units and Magnetic field · See more »

Magnetic flux

In physics, specifically electromagnetism, the magnetic flux (often denoted or) through a surface is the surface integral of the normal component of the magnetic field B passing through that surface.

New!!: International System of Units and Magnetic flux · See more »

Mass

Mass is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied.

New!!: International System of Units and Mass · See more »

Mathematician

A mathematician is someone who uses an extensive knowledge of mathematics in his or her work, typically to solve mathematical problems.

New!!: International System of Units and Mathematician · See more »

Maxwell (unit)

The maxwell (symbol: Mx) is the CGS (centimetre-gram-second) unit of magnetic flux.

New!!: International System of Units and Maxwell (unit) · See more »

Melting point

The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid at atmospheric pressure.

New!!: International System of Units and Melting point · See more »

Meridian (geography)

A (geographical) meridian (or line of longitude) is the half of an imaginary great circle on the Earth's surface, terminated by the North Pole and the South Pole, connecting points of equal longitude.

New!!: International System of Units and Meridian (geography) · See more »

Metre

The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in some metric systems, including the International System of Units (SI).

New!!: International System of Units and Metre · See more »

Metre Convention

The Metre Convention (Convention du Mètre), also known as the Treaty of the Metre, is an international treaty that was signed in Paris on 20 May 1875 by representatives of 17 nations (Argentina, Austria-Hungary, Belgium, Brazil, Denmark, France, Germany, Italy, Peru, Portugal, Russia, Spain, Sweden and Norway, Switzerland, Turkey, United States of America, and Venezuela).

New!!: International System of Units and Metre Convention · See more »

Metre per second squared

The metre per second squared is the unit of acceleration in the International System of Units (SI).

New!!: International System of Units and Metre per second squared · See more »

Metre–tonne–second system of units

The metre–tonne–second or MTS system of units is a system of physical units.

New!!: International System of Units and Metre–tonne–second system of units · See more »

Metric prefix

A metric prefix is a unit prefix that precedes a basic unit of measure to indicate a multiple or fraction of the unit.

New!!: International System of Units and Metric prefix · See more »

Metric system

The metric system is an internationally adopted decimal system of measurement.

New!!: International System of Units and Metric system · See more »

Metrication

Metrication or metrification is conversion to the metric system of units of measurement.

New!!: International System of Units and Metrication · See more »

Metrology

Metrology is the science of measurement.

New!!: International System of Units and Metrology · See more »

Millimeter of mercury

A millimeter of mercury is a manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury one millimetre high and now defined as precisely pascals.

New!!: International System of Units and Millimeter of mercury · See more »

Minute

The minute is a unit of time or angle.

New!!: International System of Units and Minute · See more »

Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.

New!!: International System of Units and Minute and second of arc · See more »

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).

New!!: International System of Units and MKS system of units · See more »

Mole (unit)

The mole, symbol mol, is the SI unit of amount of substance.

New!!: International System of Units and Mole (unit) · See more »

Molecular mass

Relative Molecular mass or molecular weight is the mass of a molecule.

New!!: International System of Units and Molecular mass · See more »

Molecule

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.

New!!: International System of Units and Molecule · See more »

Multiplication

Multiplication (often denoted by the cross symbol "×", by a point "⋅", by juxtaposition, or, on computers, by an asterisk "∗") is one of the four elementary mathematical operations of arithmetic; with the others being addition, subtraction and division.

New!!: International System of Units and Multiplication · See more »

Myanmar

Myanmar, officially the Republic of the Union of Myanmar and also known as Burma, is a sovereign state in Southeast Asia.

New!!: International System of Units and Myanmar · See more »

National Institute of Standards and Technology

The National Institute of Standards and Technology (NIST) is one of the oldest physical science laboratories in the United States.

New!!: International System of Units and National Institute of Standards and Technology · See more »

Nautical mile

A nautical mile is a unit of measurement defined as exactly.

New!!: International System of Units and Nautical mile · See more »

Navigation

Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.

New!!: International System of Units and Navigation · See more »

Neper

The neper (symbol: Np) is a logarithmic unit for ratios of measurements of physical field and power quantities, such as gain and loss of electronic signals.

New!!: International System of Units and Neper · See more »

Newton (unit)

The newton (symbol: N) is the International System of Units (SI) derived unit of force.

New!!: International System of Units and Newton (unit) · See more »

Newton's laws of motion

Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics.

New!!: International System of Units and Newton's laws of motion · See more »

Non-SI units mentioned in the SI

This is a list of units that are not defined as part of the International System of Units (SI), but are otherwise mentioned in the SI, because either the General Conference on Weights and Measures (CGPM) accepts their use as being multiples or submultiples of SI-units, they have important contemporary application worldwide, or are otherwise commonly encountered worldwide.

New!!: International System of Units and Non-SI units mentioned in the SI · See more »

Oersted

The oersted (symbol Oe) is the unit of the auxiliary magnetic field '''H''' in the centimetre–gram–second system of units (CGS).

New!!: International System of Units and Oersted · See more »

Ohm

The ohm (symbol: Ω) is the SI derived unit of electrical resistance, named after German physicist Georg Simon Ohm.

New!!: International System of Units and Ohm · See more »

Outline of the metric system

The following outline is provided as an overview of and topical guide to the metric system: Metric system – various loosely related systems of measurement that trace their origin to the decimal system of measurement introduced in France during the French Revolution.

New!!: International System of Units and Outline of the metric system · See more »

Oxford University Press

Oxford University Press (OUP) is the largest university press in the world, and the second oldest after Cambridge University Press.

New!!: International System of Units and Oxford University Press · See more »

Pascal (unit)

The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength.

New!!: International System of Units and Pascal (unit) · See more »

Permeability (earth sciences)

Permeability in fluid mechanics and the earth sciences (commonly symbolized as κ, or k) is a measure of the ability of a porous material (often, a rock or an unconsolidated material) to allow fluids to pass through it.

New!!: International System of Units and Permeability (earth sciences) · See more »

Phot

A phot (ph) is a photometric unit of illuminance, or luminous flux through an area.

New!!: International System of Units and Phot · See more »

Physical quantity

A physical quantity is a physical property of a phenomenon, body, or substance, that can be quantified by measurement.or we can say that quantities which we come across during our scientific studies are called as the physical quantities...

New!!: International System of Units and Physical quantity · See more »

Physikalisch-Technische Bundesanstalt

The Physikalisch-Technische Bundesanstalt (PTB) is the national metrology institute of the Federal Republic of Germany, with scientific and technical service tasks.

New!!: International System of Units and Physikalisch-Technische Bundesanstalt · See more »

Planck constant

The Planck constant (denoted, also called Planck's constant) is a physical constant that is the quantum of action, central in quantum mechanics.

New!!: International System of Units and Planck constant · See more »

Platinum

Platinum is a chemical element with symbol Pt and atomic number 78.

New!!: International System of Units and Platinum · See more »

Platinum-iridium alloy

Platinum-iridium alloys are alloys of the platinum group precious metals platinum and iridium.

New!!: International System of Units and Platinum-iridium alloy · See more »

Poise (unit)

The poise (symbol P) is the unit of dynamic viscosity (absolute viscosity) in the centimetre–gram–second system of units.

New!!: International System of Units and Poise (unit) · See more »

Pound (mass)

The pound or pound-mass is a unit of mass used in the imperial, United States customary and other systems of measurement.

New!!: International System of Units and Pound (mass) · See more »

Power (physics)

In physics, power is the rate of doing work, the amount of energy transferred per unit time.

New!!: International System of Units and Power (physics) · See more »

Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

New!!: International System of Units and Pressure · See more »

Printing press

A printing press is a device for applying pressure to an inked surface resting upon a print medium (such as paper or cloth), thereby transferring the ink.

New!!: International System of Units and Printing press · See more »

Proper noun

A proper noun is a noun that in its primary application refers to a unique entity, such as London, Jupiter, Sarah, or Microsoft, as distinguished from a common noun, which usually refers to a class of entities (city, planet, person, corporation), or non-unique instances of a specific class (a city, another planet, these persons, our corporation).

New!!: International System of Units and Proper noun · See more »

Properties of water

Water is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, which is nearly colorless apart from an inherent hint of blue. It is by far the most studied chemical compound and is described as the "universal solvent" and the "solvent of life". It is the most abundant substance on Earth and the only common substance to exist as a solid, liquid, and gas on Earth's surface. It is also the third most abundant molecule in the universe. Water molecules form hydrogen bonds with each other and are strongly polar. This polarity allows it to separate ions in salts and strongly bond to other polar substances such as alcohols and acids, thus dissolving them. Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity. Water is amphoteric, meaning that it is both an acid and a base—it produces + and - ions by self-ionization.

New!!: International System of Units and Properties of water · See more »

Proposed redefinition of SI base units

The International Committee for Weights and Measures (CIPM) has proposed revised definitions of the SI base units, for consideration at the 26th General Conference on Weights and Measures (CGPM).

New!!: International System of Units and Proposed redefinition of SI base units · See more »

Radian

The radian (SI symbol rad) is the SI unit for measuring angles, and is the standard unit of angular measure used in many areas of mathematics.

New!!: International System of Units and Radian · See more »

Radiant flux

In radiometry, radiant flux or radiant power is the radiant energy emitted, reflected, transmitted or received, per unit time, and spectral flux or spectral power is the radiant flux per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength.

New!!: International System of Units and Radiant flux · See more »

Radioactive decay

Radioactive decay (also known as nuclear decay or radioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron in the case of internal conversion.

New!!: International System of Units and Radioactive decay · See more »

Radionuclide

A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is an atom that has excess nuclear energy, making it unstable.

New!!: International System of Units and Radionuclide · See more »

Rapeseed

Rapeseed (Brassica napus), also known as rape, oilseed rape, (and, in the case of one particular group of cultivars, canola), is a bright-yellow flowering member of the family Brassicaceae (mustard or cabbage family), cultivated mainly for its oil-rich seed.

New!!: International System of Units and Rapeseed · See more »

Relative change and difference

In any quantitative science, the terms relative change and relative difference are used to compare two quantities while taking into account the "sizes" of the things being compared.

New!!: International System of Units and Relative change and difference · See more »

Sèvres

Sèvres is a commune in the southwestern suburbs of Paris, France.

New!!: International System of Units and Sèvres · See more »

Second

The second is the SI base unit of time, commonly understood and historically defined as 1/86,400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each.

New!!: International System of Units and Second · See more »

SI base unit

The International System of Units (SI) defines seven units of measure as a basic set from which all other SI units can be derived.

New!!: International System of Units and SI base unit · See more »

SI derived unit

SI derived units are units of measurement derived from the seven base units specified by the International System of Units (SI).

New!!: International System of Units and SI derived unit · See more »

Siemens (unit)

The siemens (symbol: S) is the derived unit of electric conductance, electric susceptance and electric admittance in the International System of Units (SI).

New!!: International System of Units and Siemens (unit) · See more »

Sievert

The sievert (symbol: SvNot be confused with the sverdrup or the svedberg, two non-SI units that sometimes use the same symbol.) is a derived unit of ionizing radiation dose in the International System of Units (SI) and is a measure of the health effect of low levels of ionizing radiation on the human body.

New!!: International System of Units and Sievert · See more »

Slash (punctuation)

The slash is an oblique slanting line punctuation mark.

New!!: International System of Units and Slash (punctuation) · See more »

Solid angle

In geometry, a solid angle (symbol) is a measure of the amount of the field of view from some particular point that a given object covers.

New!!: International System of Units and Solid angle · See more »

Speed of light

The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.

New!!: International System of Units and Speed of light · See more »

Spermaceti

Spermaceti (from Greek sperma meaning "seed", and ceti, the genitive form of "whale") is a waxy substance found in the head cavities of the sperm whale (and, in smaller quantities, in the oils of other whales).

New!!: International System of Units and Spermaceti · See more »

Standard (metrology)

In metrology (the science of measurement), a standard (or etalon) is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity.

New!!: International System of Units and Standard (metrology) · See more »

Standard gravity

The standard acceleration due to gravity (or standard acceleration of free fall), sometimes abbreviated as standard gravity, usually denoted by or, is the nominal gravitational acceleration of an object in a vacuum near the surface of the Earth.

New!!: International System of Units and Standard gravity · See more »

Steradian

No description.

New!!: International System of Units and Steradian · See more »

Stilb (unit)

The stilb (sb) is the CGS unit of luminance for objects that are not self-luminous.

New!!: International System of Units and Stilb (unit) · See more »

Stress (mechanics)

In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material.

New!!: International System of Units and Stress (mechanics) · See more »

Symbol

A symbol is a mark, sign or word that indicates, signifies, or is understood as representing an idea, object, or relationship.

New!!: International System of Units and Symbol · See more »

System of measurement

A system of measurement is a collection of units of measurement and rules relating them to each other.

New!!: International System of Units and System of measurement · See more »

Technical standard

A technical standard is an established norm or requirement in regard to technical systems.

New!!: International System of Units and Technical standard · See more »

Temperature

Temperature is a physical quantity expressing hot and cold.

New!!: International System of Units and Temperature · See more »

Temperature measurement

Temperature measurement, also known as thermometry, describes the process of measuring a current local temperature for immediate or later evaluation.

New!!: International System of Units and Temperature measurement · See more »

Tesla (unit)

The tesla (symbol T) is a derived unit of magnetic flux density (informally, magnetic field strength) in the International System of Units.

New!!: International System of Units and Tesla (unit) · See more »

Thermodynamic temperature

Thermodynamic temperature is the absolute measure of temperature and is one of the principal parameters of thermodynamics.

New!!: International System of Units and Thermodynamic temperature · See more »

Time

Time is the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future.

New!!: International System of Units and Time · See more »

Tonne

The tonne (Non-SI unit, symbol: t), commonly referred to as the metric ton in the United States, is a non-SI metric unit of mass equal to 1,000 kilograms;.

New!!: International System of Units and Tonne · See more »

Torque

Torque, moment, or moment of force is rotational force.

New!!: International System of Units and Torque · See more »

Triple point

In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.

New!!: International System of Units and Triple point · See more »

Tropical year

A tropical year (also known as a solar year) is the time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice.

New!!: International System of Units and Tropical year · See more »

Typewriter

A typewriter is a mechanical or electromechanical machine for writing characters similar to those produced by printer's movable type.

New!!: International System of Units and Typewriter · See more »

Unified atomic mass unit

The unified atomic mass unit or dalton (symbol: u, or Da) is a standard unit of mass that quantifies mass on an atomic or molecular scale (atomic mass).

New!!: International System of Units and Unified atomic mass unit · See more »

Unified Code for Units of Measure

The Unified Code for Units of Measure (the UCUM) is a system of codes for unambiguously representing measurement units to both humans and machines.

New!!: International System of Units and Unified Code for Units of Measure · See more »

Unit of measurement

A unit of measurement is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same kind of quantity.

New!!: International System of Units and Unit of measurement · See more »

United States

The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.

New!!: International System of Units and United States · See more »

University of Edinburgh

The University of Edinburgh (abbreviated as Edin. in post-nominals), founded in 1582, is the sixth oldest university in the English-speaking world and one of Scotland's ancient universities.

New!!: International System of Units and University of Edinburgh · See more »

University of North Carolina

The University of North Carolina is a multi-campus public university system composed of all 16 of North Carolina's public universities, as well as the NC School of Science and Mathematics, the nation's first public residential high school for gifted students.

New!!: International System of Units and University of North Carolina · See more »

Vacuum

Vacuum is space devoid of matter.

New!!: International System of Units and Vacuum · See more »

Velocity

The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time.

New!!: International System of Units and Velocity · See more »

Viscosity

The viscosity of a fluid is the measure of its resistance to gradual deformation by shear stress or tensile stress.

New!!: International System of Units and Viscosity · See more »

Volt

The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force.

New!!: International System of Units and Volt · See more »

Voltage

Voltage, electric potential difference, electric pressure or electric tension (formally denoted or, but more often simply as V or U, for instance in the context of Ohm's or Kirchhoff's circuit laws) is the difference in electric potential between two points.

New!!: International System of Units and Voltage · See more »

Washington, D.C.

Washington, D.C., formally the District of Columbia and commonly referred to as Washington or D.C., is the capital of the United States of America.

New!!: International System of Units and Washington, D.C. · See more »

Watt

The watt (symbol: W) is a unit of power.

New!!: International System of Units and Watt · See more »

Wavelength

In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.

New!!: International System of Units and Wavelength · See more »

Weber (unit)

In physics, the weber (symbol: Wb) is the SI unit of magnetic flux.

New!!: International System of Units and Weber (unit) · See more »

Weight

In science and engineering, the weight of an object is related to the amount of force acting on the object, either due to gravity or to a reaction force that holds it in place.

New!!: International System of Units and Weight · See more »

Wilhelm Eduard Weber

Wilhelm Eduard Weber (24 October 1804 – 23 June 1891) was a German physicist and, together with Carl Friedrich Gauss, inventor of the first electromagnetic telegraph.

New!!: International System of Units and Wilhelm Eduard Weber · See more »

William Thomson, 1st Baron Kelvin

William Thomson, 1st Baron Kelvin, (26 June 1824 – 17 December 1907) was a Scots-Irish mathematical physicist and engineer who was born in Belfast in 1824.

New!!: International System of Units and William Thomson, 1st Baron Kelvin · See more »

Word processor

A word processor is a computer program or device that provides for input, editing, formatting and output of text, often plus other features.

New!!: International System of Units and Word processor · See more »

Work (physics)

In physics, a force is said to do work if, when acting, there is a displacement of the point of application in the direction of the force.

New!!: International System of Units and Work (physics) · See more »

World War II

World War II (often abbreviated to WWII or WW2), also known as the Second World War, was a global war that lasted from 1939 to 1945, although conflicts reflecting the ideological clash between what would become the Allied and Axis blocs began earlier.

New!!: International System of Units and World War II · See more »

Yale University Press

Yale University Press is a university press associated with Yale University.

New!!: International System of Units and Yale University Press · See more »

Redirects here:

Dimensions of units, History of the International System of Units, ISO unit, ISO units, International System of Measurements, International System of Units (SI), International Systems of Units, International Systems of Units (SI), International system of units, Le Systeme International d'Unites, Le Système International d'Unités, Metric units, Metrique Systeme International, Modern metric system, Métrique Système International, Old SI, Old SI definitions, S I, S.I., S.I. system, S.i., SI, SI Unit, SI Units, SI brochure, SI system, SI system of units, SI unit, SI unit symbols and values of quantities, SI units, SI-unit, Si system, Si units, System International, Systeme International, Systeme International d'Unites, Systeme International d'Unités, Systeme International d'unites, Systeme International d'unities, Systeme Internationale, Systeme Internationalle, Systeme international d'unites, Systeme international unit, Système International, Système International d'Unités, Système Internationalle, Système international, Système international d'unités, The International System of Units, Unit name (SI), Unit names.

References

[1] https://en.wikipedia.org/wiki/International_System_of_Units

OutgoingIncoming
Hey! We are on Facebook now! »