What do the current SI definitions of kilogram and Kelvin actually mean?

Question

As per [Wikipedia](https://en.wikipedia.org/wiki/International_System_of_Units), the new definition of kilogram is, “The kilogram is defined by setting the [Planck constant](https://en.wikipedia.org/wiki/Planck_constant) *h* exactly to 6.62607015×10−34 J⋅s (J = kg⋅m2⋅s−2), given the definitions of the metre and the second.”, while that for Kelvin is, “The kelvin is defined by setting the fixed numerical value of the [Boltzmann constant](https://en.wikipedia.org/wiki/Boltzmann_constant) *k* to 1.380649×10−23 J⋅K−1, (J = kg⋅m2⋅s−2), given the definition of the kilogram, the metre, and the second.”

These are the only two, in the list of 7 which don’t help form an idea of what that quantity actually is.

In: Physics

Answer 1

The Planck constant is energy times time, which is momentum times distance, and momentum is force times velocity, and force is how you accelerate mass.

So, with energy, distance, and time, you know mass.