How come people say 5,000 km and not 5 Mm?
why not just say millions of meters or Mega meters?

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[–] 78 points 2 years ago (22 children)

Familiarity I guess. Mega isn't really a widely used prefix outside of computers. We even say tons instead of megagrams.

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  • [–] 31 points 2 years ago (5 children)

    megaton, megawatt, megapascal, megacandela (for military flares), megahertz, megajoule, megaohm, megabequerel

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