A Simple Watt Balance for the Absolute Determination of Mass

Autor/inn/en	Quinn, Terry; Quinn, Lucas; Davis, Richard
Titel	A Simple Watt Balance for the Absolute Determination of Mass
Quelle	In: Physics Education, 48 (2013) 5, S.601-606 (6 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0031-9120
DOI	10.1088/0031-9120/48/5/601
Schlagwörter	Science Instruction; Physics; Laboratory Equipment; Measurement Equipment; Energy; Magnets; Scientific Principles; Secondary School Science; Science Laboratories; College Science + Suchen Sie Ihr Suchwort? Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Physik; Laborausstattung; Messinstrument; Energie; Stabmagnet
Abstract	A watt balance is an electromechanical device that allows a mass to be determined in terms of measurable electrical and mechanical quantities, themselves traceable to the fundamental constants of physics. International plans are well advanced to redefine the unit of mass, the kilogram, in terms of a fixed numerical value for the Planck constant. A watt balance is one of the devices now being used to measure the Planck constant, but after redefinition will be used to make practical realizations of the kilogram. In this paper we describe a simple "homemade" watt balance working at the level of about 10% which demonstrates the principle with a view to demystifying the proposed new definition of the kilogram to be based on the Planck constant. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10