September 21, 2018 admin123@ No comments exist



The Kibble Balance, an exquisitely accurate weighing machineloosens France’s grip on the kiloas it measures mass more accurately.  From 1790s, 1 kg = a cylinder of metal (which changes weight as it reacts with air) in a Paris vault.  The Kibble, a 1975 British invention, defines weight against the Planck constant, one of nature’s fundamental constants

Guessed the Word?               Series 30 (4/4)                   [pic: NIST]



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