New definitions for the kilogram and mole
Measurement of mass (including the avoirdupois pound, which is legally defined as 0.45359237 kg) is no longer bound to a metal cylinder in a Paris vault. Instead, Planck's Constant is now a defined constant, and the kilogram is based on it.
Measurement of mass (including the avoirdupois pound, which is legally defined as 0.45359237 kg) is no longer bound to a metal cylinder in a Paris vault. Instead, Planck's Constant is now a defined constant, and the kilogram is based on it.