4 ms·

The SI unit of measure is the Kilogram, not the gram. Therefore they ought to be using the kilokilogram KKg, not the Mg.

immibis 2y ago
Just because the definition is based on 1000 of the base unit doesn't mean the prefixes start being weird.
- stonemetal12 2y ago
  Not sure what you mean, kg is the base unit. /s >The SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time), metre (m, length), kilogram (kg, mass), ampere (A, electric current), kelvin (K, thermodynamic temperature), mole (mol, amount of substance), and candela (cd, luminous intensity). https://en.wikipedia.org/wiki/International_System_of_Units https://en.wikipedia.org/wiki/International_System_of_Units
rad_gruchalski 2y ago
the SI unit for kilogram is kg and not Kg
burnished 2y ago
Huh. It looks goofy but it would sidestep the overloaded mm problem.
School-Cotton 2y ago
What does it actually mean for the base unit to be the kilogram, as opposed to the gram, now that they're defined in terms of fundamental constants?
- stonemetal12 2y ago
  It means if you are using SI units "The kilogram is defined by setting the Planck constant h to 6.62607015×10−34 J⋅s (J = kg⋅m2⋅s−2), given the definitions of the metre and the second." and gram is some random word you made up, with no definition under SI. https://en.wikipedia.org/wiki/International_System_of_Units https://en.wikipedia.org/wiki/International_System_of_Units
  - School-Cotton 2y ago
    The gram is indeed defined by SI to be 1/1000th of a kilogram, it's not a random word I made up. There is no logical difference between the definition you gave, and an alternative definition that says "the gram is defined by setting the Planck constant h to 6.62607015×10−31 J⋅s (J = g⋅m2⋅s−2), given the definitions of the metre and the second", and then defining 1 kg = 1000 g. Which is why I'm asking what this distinction actually means, if anything. It meant something that feels more real when the kilogram was defined as the mass of a physical reference kilogram object in a vault in Paris, but that changed a few years ago.
hansvm 2y ago
> gram Don't you mean a millikilogram (mkg)?

immibis 2y ago

Just because the definition is based on 1000 of the base unit doesn't mean the prefixes start being weird.

stonemetal12 2y ago
Not sure what you mean, kg is the base unit. /s >The SI comprises a coherent system of units of measurement starting with seven base units, which are the second (symbol s, the unit of time), metre (m, length), kilogram (kg, mass), ampere (A, electric current), kelvin (K, thermodynamic temperature), mole (mol, amount of substance), and candela (cd, luminous intensity). https://en.wikipedia.org/wiki/International_System_of_Units https://en.wikipedia.org/wiki/International_System_of_Units

rad_gruchalski 2y ago

the SI unit for kilogram is kg and not Kg

burnished 2y ago

Huh. It looks goofy but it would sidestep the overloaded mm problem.

School-Cotton 2y ago

What does it actually mean for the base unit to be the kilogram, as opposed to the gram, now that they're defined in terms of fundamental constants?

stonemetal12 2y ago
It means if you are using SI units "The kilogram is defined by setting the Planck constant h to 6.62607015×10−34 J⋅s (J = kg⋅m2⋅s−2), given the definitions of the metre and the second." and gram is some random word you made up, with no definition under SI. https://en.wikipedia.org/wiki/International_System_of_Units https://en.wikipedia.org/wiki/International_System_of_Units
- School-Cotton 2y ago
  The gram is indeed defined by SI to be 1/1000th of a kilogram, it's not a random word I made up. There is no logical difference between the definition you gave, and an alternative definition that says "the gram is defined by setting the Planck constant h to 6.62607015×10−31 J⋅s (J = g⋅m2⋅s−2), given the definitions of the metre and the second", and then defining 1 kg = 1000 g. Which is why I'm asking what this distinction actually means, if anything. It meant something that feels more real when the kilogram was defined as the mass of a physical reference kilogram object in a vault in Paris, but that changed a few years ago.

hansvm 2y ago

> gram Don't you mean a millikilogram (mkg)?