Fabrication of the Magnetic Circuit for the Bipm Watt Balance


INTRODUCTION Since 1889 the International Prototype of the Kilogram, kept at the BIPM, had served as the definition of the unit of mass in the International System of Units (SI). It is the last material artefact to define a base unit of the SI, and it influences several other base units. This situation is no longer adequate in a time of ever increasing… (More)


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