Tag: NIST

September 21, 2018 admin123@ No comments exist

  Kilo 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…