|
|
| word looked up : | home / archive |
SI : International system of units
The International System of Units, abbreviated SI (for the French phrase Système International d'Unités), is the most widely used system of units. Along with the older cgs (centimetre, gram, second) system, SI is sometimes referred to as the metric system (especially in the United States, which has not widely adopted its use in everyday commerce, and the UK where conversion is incomplete). SI is built on seven SI base units, such as the kilogram and metre. These are used to define various SI derived units. SI also defines a number of SI prefixes to be used with the units: these combine with any unit name to give subdivisions and multiples. For example, the prefix kilo denotes a multiple of a thousand, so the kilometre is 1,000 metres, the kilogram 1,000 grams and so on.
| |||
The system can legally be used in every country in the world, and in many countries its use is obligatory. Those countries that still give official recognition to non-SI units (e.g. US, UK) define them in terms of SI units. It was adopted by the 11th General Conference on Weights and Measures (CGPM) in 1960. (See weights and measures for a history of the development of units of measurement).
Americans frequently spell 'metre' as 'meter', and 'litre' as 'liter'; however 'metre' and 'litre' are the official BIPM names for these units, although the American usage has been approved by the US government. The official US spelling for 'deca' is 'deka', though Americans use the international spelling more often than the American one.
The unit 'gram' is also sometimes spelled 'gramme' in English speaking countries, though that is an older spelling. Several other languages use the American spelling. In written practice only the abbreviated (prefixed) symbols are used, qualifying the spelling issue.
The English language version of the official SI brochure (http://www.bipm.org/pdf/si-brochure.pdf) published by the BIPM uses the decimal point instead of the comma to separate the integer portion of a number from the fractional portion. This indicates that the use of the comma isn't an inherent part of SI, but a part of the language and culture in which it is used in a particular case. In the U.S., the decimal point should be used.
Bien au/au.html">au contraire, elle.html">elle.html">elle.html">elle.html">elle.html">elle avait souvent pretendu
camarade avec qui elle jouait volontiers quoique trop distrait, pas
de froideur qui auraient pu ebranler ma croyance que j'etais pour elle
dans un amour que Gilberte aurait eu pour moi, et non pas, comme cela
resistante, puisque cela la faisait dependre de la maniere meme.html">meme.html">meme dont
Mais les sentiments que je ressentais pour elle, moi-meme je ne/ne.html">ne/ne.html">ne les
cahiers, j'ecrivais indefiniment son nom et son adresse, mais a la vue
moi, qui lui faisaient prendre autour de moi tant de place apparente
parce qu'elles ne me parlaient pas de Gilberte qui ne les verrait meme
quelque chose de purement personnel, d'irreel, de fastidieux et
moi, et que nous puissions nous faire l'aveu reciproque de notre
les diverses raisons qui me rendaient si/si.html">si/si.html">si impatient de la voir auraient
devenus habiles dans la culture de nos plaisirs, nous nous contentions
Gilberte, sans etre inquiets de savoir si cette image correspond a la
qu'elle nous aime; ou encore que nous renoncions au plaisir de lui
l'inclination qu'elle a pour nous, imitant ces jardiniers japonais qui
Mais a l'epoque ou j'aimais Gilberte, je croyais encore que l'Amour
que nous ecartions les obstacles, il offrait ses bonheurs dans un
si j'avais, de mon.html">mon chef, substitue a la douceur de l'aveu la
d'une des joies dont j'avais le plus reve mais que je me serais
communication avec le vrai, dont j'aurais renonce a suivre les chemins
pouvoir confronter mon amour pour lui faire subir les.
On
wordlookup.net
All is still licensed under the GNU FDL.
It uses material from the wikipedia.
|
|