Disseminating the kilogram, no strings attached
Tuesday, August 28, 2012 - 08:30
in Physics & Chemistry
(Phys.org)—The impending redefinition of the kilogram presents a weighty dilemma. Methods to be used to realize the redefined kilogram are based on the Planck constant and the Avogadro constant respectively and realize the kilogram in vacuum. But secondary standards, as well as transfer standards for laboratory and industrial use, must be deployed in air.