Equation 3 · Part 6 · The Last Artefact: Redefining the Kilogram
=
=
What this part means
The expressions on both sides represent the same quantity under the stated assumptions.
Its job in the formula
The equals sign connects the complete expression on the left with the complete expression on the right. Both sides must have compatible units.
Full expression→=→Article meaning
The passage around this formula
The geometric factor Bl appears in both and is eliminated between them: . The BIPM’s mise en pratique is careful about what has just happened: “power of a mechanical nature is equated to power of an electromagnetic nature. The powers are manifestly ‘virtual’ in this method of operation because power does not figure in either mode of this two-mode experiment” [ 4 ] . No power is transferred in either measurement. The equality is between quantities constructed after the fact.
Learn the underlying idea
An equals sign says that the expression on its left and the expression on its right have the same value under the stated definitions and assumptions.
Open the illustrated equality: what the equals sign claims guide →
Sources cited in the surrounding passage
These citations provide research context; check each source for the exact claim it supports.