3 ms·
I think they mean that the gram is defined as 1/1000 of a kilogram. With a kilogram having a definition based on physical constants.
by tokai 1y ago
I think they mean that the gram is defined as 1/1000 of a kilogram. With a kilogram having a definition based on physical constants.
- jabl 1y agoThe kilogram is no longer defined by a physical artifact, fwiw. Anyway, the point is the inconsistency in the system due to the kilogram being the base unit. So derived units are defined in terms of kilogram rather than gram. Say, the unit of force, Newton (N), is defined as kgm/s^2 and not gm/s^2). Or pressure, Pascal (Pa) which is N/m^2 which inherits N being defined in terms of the kilogram). And so on. Anyway, an annoying inconsistency maybe but doesn't really affect usage of the system once you get used to it.