A new definition of the kilogram is required, an international team of scientists contends. The current one is imprecise, they say, because it is not linked to an unvarying property of nature. The ...
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 ...
How we measure the world underwent a quantum leap on Monday as scientists adopted new hyper-accurate definitions for units of weight, electricity and temperature derived from the universal laws of ...
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