“There is nothing noble in being superior to some other man. The true nobility is in being superior to your previous self.” Probably W.L. Sheldon, US lecturer on ethics (1858 – 1907) rather than Ernest Hemingway.
Wednesday, 26 August 2015
Avogadro and the kilogram
A kilogram defined in terms of fundamental constant instead of a physical mass will expand international access to precise measurements.