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A system of fundamental quantities (or sometimes fundamental dimensions) is such that every other quantity can be generated from them. Traditionally, the accepted fundamental quantities are mass, length, time, and temperature, but in principle, other fundamental quantities could be used.

Correspondingly, a system of fundamental units is such that every other unit can be generated from them. The kilogram, metre, second, ampere, KelvinThe kelvin (symbol: K is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvin is absolute zero (when molecular motion stops), and one kelvin is the fraction 1/273. 16 of the thermodynamic temperature o, moleThe mole (symbol: mol) is one of the seven SI base units and is commonly used in chemistry. It measures the amount of substance of a system and is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 0 and candelaThe candela (symbol: cd, Latin for candle) is one of the seven SI base units. It is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 Hz and that has a radiant intensity in that direction are the fundamental units of the SIThe International System of Units (symbol: SI (for the French phrase Systeme International d'Unites , is the most widely used system of units. It is used for everyday commerce in virtually every country of the world except the United States, and it is uni system of units, termed SI base unitsThe SI system of units defines seven SI base units fundamental physical units defined by an operational definition. All other physical units can be derived from these base units: these are known as SI derived units. Derivation is by dimensional analysis.; other units such as the newtonThis article is about the SI unit of force. For other uses see Newton (disambiguation In physics, the newton (symbol: N) is the SI unit of force, named after Sir Isaac Newton in recognition of his work on classical mechanics. It was adopted by the General, jouleThe joule (symbol J also called newton metre or coulomb volt is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honour of the physicist James Prescott Joule (1818-1889). 1 joule 1 N · 1 m 1 newton · 1 metre 1 k, and volt can be derived from the SI base units and are therefore termed SI derived units

The quantity velocity, for example, is length divided by time, so its unit m/s can be generated from the fundamental units metre and second.

It is an important basic fact of dimensional analysis that the fundamental units can be regarded as the basis of a special kind of vector space, the space of all units. This is a vector space over the field of rational numbers where the vector addition is given by the multiplication of units and the scalar multiplication is exponentiation of units.

Not all physically important values have units: dimensionless numbers occur in many fields of science.

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Topics: Fundamental Unit Units Quantities Time Space System Generated...

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Fundamental interactionName of InteractionRelative MagnitudeBehavior Strong nuclear force10401/r7 Electromagnetic force10381/r2 Weak nuclear force10151/r5 to 1/r7 Gravity1001/r2 A fundamental interaction is a mechanism by which particles interact with each other, and which cann Fundamental groupIn mathematics, the fundamental group is one of the basic concepts of algebraic topology. It is a group associated with every point of a topological space and conveying information about the 1-dimensional structure of the space. The fundamental group is t Fundamental frequencyThe fundamental tone often referred to simply as the fundamental is the lowest frequency in a harmonic series. The fundamental frequency of a periodic signal is the inverse of the pitch period length. The pitch period is, in turn, the smallest repeating u Fundamental theorem on homomorphismsIn abstract algebra, for a number of algebraic structures, the fundamental theorem on homomorphisms relates the structure of two objects between which a homomorphism is given, and of the kernel and image of the homomorphism. For groups, the theorem states Fundamental theorem of arithmeticIn mathematics, and in particular number theory, the fundamental theorem of arithmetic or unique factorization theorem is the statement that every positive integer can be written as a product of prime numbers in only one way. For instance, we can write :6 FundamentalismFundamentalism is a movement to return to stricter adherence to founding principles, usually in religion. In comparative religion, fundamentalism can refer to anti-modernist movements in various religions. In many ways religious fundamentalism is a modern Fundamental analysis Fundamental theorem of calculus Fundamental theorem of algebra Fundamental unit Fundamentalist Christianity Fundamentals analysis Fundamental attribution error Fundamental justice Fundamental Baptist Fellowship of America