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Saturday, April 12, 2008

NEW PATTERN KILOGRAM


Until now the pattern-kilogram (a cylinder of platinum and iridium), located in Sevres, near Paris, remains immutable. However, this pattern loses more and more mass over the years. That being the case, "nobody knows what is one kilo," said the Nobel Prize of Physics: Klaus of Klitzing. For this reason, the Comite International des Poids et Mesures sponsored works towards establishing a new pattern-kilogram. The most interesting of these:Avogadro Project, tries to determine the total number of atoms contained in a kilo of silicon crystal balls, based on the fact that in the universe, all atoms are identical. One idea already raised in 1870, by Maxwell. A tentative figure in this respect is: 1 kilogram = 21.5 quadrillion atoms of silicon-28. If the projects were not successful, the Sevres pattern-kilo will continue as a standard.
NUEVO KILO PATRON

Hasta hoy el kilo-patrón (un cilindro de platino e iridio), ubicado en Sèvres, cerca de Paris, permanece inmutable. No obstante, este patrón pierde más y más masa con el curso de los años. Siendo así : “nadie sabe lo que es un kilo”, dice el Premio Nobel de Física : Klaus of Klitzing. Por esta razón, el Sistema Internacional de Pesas y Medidas, patrocina trabajos tendientes a establecer un nuevo kilo-patrón. El mas interesante de estos : Proyecto Avogadro, trata de determinar el número total de átomos contenidos en un kilo de bolas cristalizadas de sílice, basándose en el hecho de que en el universo, los átomos son idénticos. Una idea ya planteada en 1870, por Maxwell. Una cifra tentativa en este aspecto es : 1 kilo= 21,5 cuatrillones de de átomos de silicio-28. Si los proyectos no fuesen exitosos, se retendrá el kilo-patrón de Sèvres.

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3 Comments:

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