Metric units are units based on the metre, gram or second and decimal (power of ten) multiples or sub-multiples of these. The most widely used examples are the units of the International System of Units (SI). By extension they include units of electromagnetism from the CGS and SI units systems, and other units for which use of SI prefixes has become the norm. Other unit systems using metric units include:
International System of Electrical and Magnetic Units
Metre–tonne–second (MTS) system of units
MKS system of units (metre, kilogram, second)
International System of Units
The first group of metric units are those that are at present defined as units within the International System of Units (SI). In its most restrictive interpretation, this is what may be meant when the term metric unit is used.
The unit one (1) is the unit of a quantity of dimension one. It is the neutral element of any system of units.
The SI defines 7 base units and associated symbols:
The unit one (1) is the unit of a quantity of dimension one.
The second (s) is the unit of time.
The metre (m) is the unit of length.
The kilogram (kg) is the unit of mass.
The ampere (A) is the unit of electric current.
The kelvin (K) is the unit of thermodynamic temperature.
The mole (mol) is the unit of amount of substance.
The candela (cd) is the unit of luminous intensity.
The SI also defines 22 derived units and associated symbols:
The hertz (Hz) is equal to one reciprocal second (1s-1).
The radian (rad) is equal to one (1).
The steradian (sr) is equal to one (1).
The newton (N) is equal to one kilogram-metre per second squared (1kg⋅m⋅s−2).
The pascal (Pa) is equal to one newton per square metre (1N/m2).
The joule (J) is equal to one newton-metre (1N.m).
The watt (W) is equal to one joule per second (1J/s).
The coulomb (C) is equal to one ampere second (1A⋅s).
The volt (V) is equal to one joule per coulomb (1J/C).
The weber (Wb) is equal to one volt-second (1V⋅s).
The tesla (T) is equal to one weber per square metre (1Wb/m2).
The farad (F) is equal to one coulomb per volt (1C/V).
Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.
The course deals with the concept of measuring in different domains, particularly in the electrical, optical, and microscale domains. The course will end with a perspective on quantum measurements, wh
This course is the basic introduction to modern cosmology. It introduces students to the main concepts and formalism of cosmology, the observational status of Hot Big Bang theory
and discusses major
En physique et en métrologie, une est une . Une unité de mesure peut être définie à partir de constantes fondamentales ou par un étalon, utilisé pour la mesure. Les systèmes d'unités, définis en cherchant le plus large accord dans le domaine considéré, sont rendus nécessaires par la méthode scientifique, dont l'un des fondements est la reproductibilité des expériences (donc des mesures), ainsi que par le développement des échanges d'informations commerciales ou industrielles.
Metric units are units based on the metre, gram or second and decimal (power of ten) multiples or sub-multiples of these. The most widely used examples are the units of the International System of Units (SI). By extension they include units of electromagnetism from the CGS and SI units systems, and other units for which use of SI prefixes has become the norm.
The abampere (abA), also called the biot (Bi) after Jean-Baptiste Biot, is the derived electromagnetic unit of electric current in the emu-cgs system of units (electromagnetic cgs). One abampere corresponds to ten amperes in the SI system of units. An abampere of current in a circular path of one centimeter radius produces a magnetic field of 2π oersteds at the center of the circle. The name abampere was introduced by Kennelly in 1903 as a short name for the long name (absolute) electromagnetic cgs unit of current that was in use since the adoption of the cgs system in 1875.
Explore la conservation de l'énergie dans les flux de fluides, en mettant l'accent sur les applications pratiques et l'importance des lois de la physique fondamentale.
Explore le concept de brouillage dans les systèmes chaotiques quantiques, reliant le chaos classique au chaos quantique et mettant l'accent sur la sensibilité aux conditions initiales.