Question

What is the new definition of kilogram??

Answer 1

Answer:

The definition of the kilogram changed fundamentally; the previous definition defined the kilogram as the mass of the international prototype kilogram, which is an artefact rather than a constant of nature. The new definition relates the kilogram to, amongst things, the equivalent mass of the energy of a photon given its frequency, via the Planck constant.

Answer 2

Answer:

The new definition relates the kilogram to, amongst things, the equivalent mass of the energy of a photon given its frequency, via the Planck constant. Previous definition: The kilogram is the unit of mass; it is equal to the mass of the international prototype of the kilogram.

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