The possible contribution of gravity measurements to the difference between the NIST and NRC watt balance results
| Autor: | M. C. Eckl, A D Inglis, J. Liard, D. Winester, R J Silliker, C. G. L. Gagnon, David B. Newell |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Physics
Gravity (chemistry) Watt Gravity measurement National Research Council Nuclear engineering Metallurgical engineering General Engineering Metric system National Institute of Standards and Technology Planck constant Relative uncertainty Upper limits Theoretical physics symbols.namesake Engineering Research council Planck constants symbols NIST International System of Units Watt balance |
| Zdroj: | Metrologia. 50:337-344 |
| ISSN: | 1681-7575 0026-1394 |
| Popis: | We report on a 2012 comparison of gravity used to determine the Planck constant by the National Institute of Standards and Technology (NIST) and the National Research Council Canada (NRC) watt balances. The results provide verification of the gravity values used in recently published discrepant Planck constant determinations that play a vital role in the redefinition effort of the International System of Units (SI) and set an upper limit of 10 parts in 109 on the relative uncertainty contribution of gravity observations to future Planck constant determinations by the NIST and NRC watt balances. © 2013 BIPM & IOP Publishing Ltd. Erratum published in volume 50, issue 5, pages 557-8, October 2013. DOI: 10.1088/0026-1394/50/5/557 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|