How much does a kilogram weigh? Depends on your 'Planck constant'

Members of the BIPM, which groups some 60 nations, agreed on Friday after a week-long meeting at the nearby Palace of Versailles to redefine a kilogram in terms of a tiny but unchanging value called the "Planck constant". 

from Zee News :Sci-Tech https://ift.tt/2PBcOPZ