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Regnirps at aol.com
Regnirps at aol.com
Wed Jun 9 04:04:42 GMT 1999
In a message dated 6/8/99 8:32:32 AM, peter at ntserver.techedge.com.au writes:
>Charlie Springer wrote:
>
>> I agree completely, until you start working with E&M.
>> Electricity and magnetism is a mess.
>
>You want to explain what you're saying here?
>
>--
>Peter Gargano
If you look at MKS and CGS version of stuff you might be surprised to find
they DO NOT differ by a power of 10. Statvolts convert to volts with a funny
fractional value and others differ by amounts that are obviously related to
the speed of light so you get factors of 300 (299.x) or 3x10^9.
IIRC it is because the permeativity and permeability (epsilon and mu) of free
space can be made to vanish if you choose the right dimensional constants,
and the units of both MKS (SI I guess these days) and CGS leave you with
these extra numbers to drag around through all your calculations.
Charlie Springer
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