Thought for the month

“In the choice between changing one’s mind and proving there is no need to do so, most people get busy on the proof.” John K. Galbraith, Economist (1908 – 2006).

Wednesday, 13 July 2016

Weights are measured

As part of the project to redefine the kilogram the NIST-4 watt balance has completed new measurements of Planck’s constant. The value of h being 6.62606983 x 10–34 kg.m2/s with an uncertainty of plus or minus 22 on the last two digits.

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