so the proposed definition was set by fixing the numerical value of the Planck constant to 6.62606X×10−34 s−1·m2·kg<p>and the conundrum was that they still needed to have a precise enough measurement of that constant because it&#x27;s an experimental measurement.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Proposed_redefinition_of_SI_base_units#Kilogram" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Proposed_redefinition_of_SI_ba...</a><p><a href="https:&#x2F;&#x2F;www.quora.com&#x2F;How-is-Plancks-constant-derived" rel="nofollow">https:&#x2F;&#x2F;www.quora.com&#x2F;How-is-Plancks-constant-derived</a>