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The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most widely used system of measurement. It is the only system of measurement with official status in nearly every country in the world, employed in science ...
The current international standard for the metric system is the International System of Units (Système international d'unités or SI). It is a system in which all units can be expressed in terms of seven units. The units that serve as the SI base units are the metre, kilogram, second, ampere, kelvin, mole, and candela.
"The metre, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s −1, where the second is defined in terms of ∆ν Cs." [1] 1 / 10 000 000 of the distance from the Earth's equator to the North Pole measured on the meridian arc ...
List of textbooks in physics: Category:Physics textbooks; List of textbooks on classical mechanics and quantum mechanics; List of textbooks in electromagnetism; List of textbooks in thermodynamics and statistical mechanics
The constants listed here are known values of physical constants expressed in SI units; that is, physical quantities that are generally believed to be universal in nature and thus are independent of the unit system in which they are measured. Many of these are redundant, in the sense that they obey a known relationship with other physical ...
The Feynman Lectures on Physics – another contemporaneously-developed and influential college-level physics series; Course of Theoretical Physics – ten-volume series of books covering advanced theoretical physics, by Lev Landau and Evgeniy Lifshitz; PSSC Physics – a contemporaneously-developed high-school-level physics textbook
[a] This system underlies the International System of Units (SI) [b] but does not itself determine the units of measurement used for the quantities. The system is formally described in a multi-part ISO standard ISO/IEC 80000 (which also defines many other quantities used in science and technology), first completed in 2009 and subsequently ...
Unit system Domain Derivation Unit name Unit symbol Dimension symbol Quantity name Definition In SI base units In other SI units SI: Physics: Basic