998 resultados para Metric system


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Supersedes similar notice dated Dec. 10, 1976.

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Bibliography: p. 50.

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Half-title: Bureau of international research, Harvard university and Radcliffe college.

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The Bureau International des Poids et Mesures, the BIPM, was established by Article 1 of the Convention du Mètre, on 20 May 1875, and is charged with providing the basis for a single, coherent system of measurements to be used throughout the world. The decimal metric system, dating from the time of the French Revolution, was based on the metre and the kilogram. Under the terms of the 1875 Convention, new international prototypes of the metre and kilogram were made and formally adopted by the first Conférence Générale des Poids et Mesures (CGPM) in 1889. Over time this system developed, so that it now includes seven base units. In 1960 it was decided at the 11th CGPM that it should be called the Système International d’Unités, the SI (in English: the International System of Units). The SI is not static but evolves to match the world’s increasingly demanding requirements for measurements at all levels of precision and in all areas of science, technology, and human endeavour. This document is a summary of the SI Brochure, a publication of the BIPM which is a statement of the current status of the SI. The seven base units of the SI, listed in Table 1, provide the reference used to define all the measurement units of the International System. As science advances, and methods of measurement are refined, their definitions have to be revised. The more accurate the measurements, the greater the care required in the realization of the units of measurement.

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Sponsored by Naval Facilities Engineering Command, Department of the Navy.

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"Eighth in a series of reports prepared for the Congress."

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1974 ed. edited by C. H. Page and P. Vigoureux.

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Mode of access: Internet.

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Mode of access: Internet.

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Vol. for 1914 has supplement (publ. 1917).

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Mode of access: Internet.

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Mode of access: Internet.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)