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Re: Re: Mains installation in garden
> Thinking about Mass and Weight, Speed and Velocity, why do we use
> Centimetres when SI is mm or m?
Ah, thats an easy one. The SI unit of length is a Metre (m).
Centi, Milli, etc are all SI Prefixes.
If you're interested see
http://en.wikipedia.org/wiki/International_System_of_Units
http://en.wikipedia.org/wiki/SI_prefix
Cheers
Stuart
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