no no - check wiki for "fundamental dimensions"

送交者: meiyou 于 2007-09-13, 14:56:37:

回答: as I said, m is defined as E/c^2, it has nothing to do with units 由 008 于 2007-09-13, 14:43:56:

"The fundamental units of the SI system are kilogram, second, ampere, kelvin, and mole. The metre and candela were formerly fundamental units but have been redefined in terms of the other units. "

所有跟贴:

I don't think wiki can tell you what mass is (无内容) - 008 (0 bytes) 2007-09-13, 14:59:52 (170258)
- kg is a fundamental not derived unit as you suggested - meiyou (203 bytes) 2007-09-13, 15:18:57 (170278)

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