a long time in different countries (and even in different regions of the same country!) Had its own measurement system.As long as people have lived relatively isolated from each other, there is no particular problem in this was not.However, due to globalization and the development of the international division of labor, the creation of a uniform system of weights and measures was inevitable.
This process took quite a long time, and its result was a kind of compromise between the major scientific schools of the world, each of which had to make certain concessions.Ultimately, the final line was announced in 1960, and was accepted as exists today international SI system.
itself is the acronym derived from the French phrase Système International and understandable not just any scientist, but also an ordinary citizen, graduated from the course of high school.At its core, the SI system is the most important set of units, as well as their literal and graphic.Its adoption does not mean that all States that have signed the appropriate charter, have to give up their own systems.However, when it comes to the works exhibited on the court of the international community, or technology, which is sold throughout the world, there is the SI system acts as a basic institution of weights and measures.
Since 1970, published a famous pamphlet SI, which gives the most detailed description of all major units of measurement, as well as reported occurred in recent changes.To date the document was reprinted eight times, and in 1985, along with French and English edition appeared.In all developed countries, the brochure goes out and the local language.
The SI considers as the main seven physical quantities.This meter, kilogram, ampere, kelvin, second, mole and candela.It is believed that none of these parameters can not be obtained from other, i.e. each of these units has a so-called independent dimension.Based on them, by means of multiplication and division are output derived units and consoles.Characteristics of these elements are constantly refined, with often serious scientific studies give rise to the need for new terms.
Certain difficulties SI system in physics has experienced due to differences in pronunciation and graphic representation of a unit, it is no secret that, for example, between the French and Chinese writing of the term "kilogram" big enough difference.In this regard, the Charter of 1960 was specifically emphasized that represent units - it does not reduce, and algebraic objects are language-independent.The only difficulty arose with Russia and other countries that use non-Latin and Cyrillic letter.The way out of this situation was the actual resolution of the international community on the use of clear signs in these states.
Currently, the SI system, on the one hand, is a certain guarantee of the inviolability of fundamental scientific concepts, on the other hand, always ready for new changes and revolutions.
