The kilogram is still defined by a chunk of metal in France that has the annoying habit of losing mass. Hopefully we can get a precise and reproducible way to define it soon.
When you define the second everything else is pretty easy.
TIme => length => volume => weight (a fraction of a 1m^3 of pure water at SATP with no special isotopes for example.)
At the bureau des poids et mesures, technically it's not in commun law france (even if it's really close to Paris), it's more a neutral ground like an embassy.
A meter is the distance between two scratches on a bar of platinum iridium kept in Sevres, France.
It used to be defined that way
The kilogram is still defined by a chunk of metal in France that has the annoying habit of losing mass. Hopefully we can get a precise and reproducible way to define it soon.
When you define the second everything else is pretty easy. TIme => length => volume => weight (a fraction of a 1m^3 of pure water at SATP with no special isotopes for example.)
Ha, it's been a long time... I will now remember this one.
At the bureau des poids et mesures, technically it's not in commun law france (even if it's really close to Paris), it's more a neutral ground like an embassy.