4 ms·
That doesn't make sense to me, the definition has changed. The IPK was 1 kg and the copies of it were all slightly heavier or lighter, for argument let's say I
by cco 8y ago
That doesn't make sense to me, the definition has changed.
The IPK was 1 kg and the copies of it were all slightly heavier or lighter, for argument let's say IPK1 was 1.1 kg and IPK2 was 0.9 kg. Now that we have a constant for the mass of 1 kg, all of those IPK's will now have a new mass relative to the new definition.
Unless the new definition was based on the current IPK and set its mass as of today as the standard, and that standard now will be unchanging?
- ekimekim 8y ago> Unless the new definition was based on the current IPK and set its mass as of today as the standard, and that standard now will be unchanging? Correct. The current IPK will still be 1kg to within margin of error at the time the new definition comes into effect, but any further changes to it will make it, for the first time, drift away from that value.