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What are the seven fundamental units?


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Solution

Seven fundamental units:

The fundamental units are the base units defined by the International System of Units, such units are not derived from any other unit, therefore they are called fundamental units

Seven fundamental units:

UnitPhysical QuantitySymbolDefinition
meterlengthmThe length of the path traveled by light in a vacuum during the time interval of 1/299792458 of a second (17th CPGM, 1983); originally 1/10000000 of the distance from the North Pole to the Equator through Paris, France.
kilogrammasskgThe mass is equal to the International Prototype of the kilogram (3rdCPGM, 1901) originally defined as the mass of 1dm3 (1liter) of water at 4°C.
secondtimesThe duration of 9192631770 periods of the radiation corresponds to the transition between the two hyperfine levels of the ground state of the cesium-133 atom.
ampereelectric currentAThe constant of current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1metre apart in a vacuum, would produce between these conductors a force equal to 2×10-7 newton per meter of length.
kelvinthermodynamic temperatureKThe fraction 1/273.16 of the thermodynamic triple point of water (approximately the fraction 1/100 of the temperature difference between the freezing point and boiling point of water at 101.315kPapressure).
moleamount of a substancemolThe amount of a substance of a system that contains as many elementary entities (atoms, molecules, ions, electrons, or other particles or specified groups of particles) as there are atoms in 0.012kg of carbon-12.
candelaluminous intensitycdThe luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540×1012hertz and that has a radiant intensity in that direction of 1/683wattpersteradian.


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