Kilogram: Perbedaan antara revisi

| inunits2 = ≈&thinsp;{{val|4.59|e=7|u=[[massa planck]]}}<br>{{val|1.356392608|(60)|e=50}} [[hertz]]&thinsp;<ref groupname="Note">One kilogram at rest has an equivalent energy approximately equal to the energy of photons whose frequencies sum to this value.</ref>