Because of the possible mass change of the international prototype kilogram—the last of the International System of Units (SI) base units still defined by a physical artifact—the metrology community ...
India on May 20 adopted a global resolution to redefine four of the seven base units -- kilogramme, kelvin, mole and ampere, a move expected to have far-reaching effects, including changes in ...
The new kilogram (unit of weight) and three other new base units - ampere (electric current), Kelvin (temperature) and mole (amount of substance such as atoms) - will now not be based on 'physical ...
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