3 ms·
150kkm - wouldn't that be 150 Mm?
by wolfi1 4mo ago
150kkm - wouldn't that be 150 Mm?
- halper 4mo agoYes, you are correct. As the SI brochure states: "Compound prefix symbols, i.e. prefix symbols formed by the juxtaposition of two or more prefix symbols, are not permitted." Unfortunately, almost no one uses SI units and/or prefixes correctly.
- taffydavid 4mo agoI have another alternative: you could simply prefix the km with ,000
- AngryData 4mo agoMeh, units should be used at the convenience of us, they are all arbitrarily defined to start with. We still use lots of non-si units, like AUs, minutes seconds and hours, degrees and arc units, or whatever else. Conversion is easier than ever today so I think units should be adapted to the application and use more fractional units when appropriate.
- ben_w 4mo agoSure, also 1 mAU and 0.5 light seconds, but treating km as a base unit and prefixing it with another k isn't too uncommon a misuse.
- bibelo 4mo agoit's also 150 000 000 meters