Experimental Determination of Air Density Using a 1 kg Mass Comparator in Vacuum
1991; IOP Publishing; Volume: 28; Issue: 1 Linguagem: Inglês
10.1088/0026-1394/28/1/007
ISSN1681-7575
AutoresM. Gläser, Roman Schwartz, M Mecke,
Tópico(s)Experimental and Theoretical Physics Studies
ResumoThe density of ambient air has been determined by a straightforward experimental method. The apparent masses of two artefacts having about the same mass and surface, but different well-known volumes, have been compared by using a 1 kg balance in vacuum and in air. The differences of apparent masses and volumes yield the air density with a relative uncertainty (1σ) of 5 × 10-5. From measurements made using a third artefact, surface sorption effects caused by the change between vacuum and air conditions gave a coefficient of about 0,2 μg cm-2.
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