Gene Mechtly wrote in USMA 10127: >On Tue, 26 Dec 2000, Duncan Bath wrote: > >> What about 7.5 Mg? >Duncan, > Forget Mg where there is almost no established traditional usage. >7.5 tons (where one ton is *defined* as 1000 kg) is much better for *large >multiples of the SI unit of mass (kg)*, in accord with established usage. > Only for small submultiples of mass, e.g. for a few milligrams or >micrograms, are prefixes applied to g (gram) preferable (where there is >also long established usage). >Gene. But Mg is purer SI. Ton or tonne is only a "non-SI unit accepted for use with the International System", whereas megagram is a "decimal multiple of an SI unit".
