Metric essay

[Tom Parker]

Robertson, Nigel <nigel.robertson at roke.co.uk> wrote:

>At last someone with a true grip on the situation.

>Incidentally, I believe that people at the National Physics Lab in the UK
>have been developing a replacement definition for the kilogram and is based
>on forces produced by an electromagnet.  This force can be related to
>voltage and current which are better defined than the lump of metal platinum
>under the glass dome at NPL which is slowly evaporating away

This is interesting...

I seem to remember that the amp was defined by the force generated by an
electromagnet? Not totally sure on this one.

This is the limit of my metrology knowlege. I'm going to shut up now... 

--
Tom Parker - parkert at ihug.co.nz
           - http://www.geocities.com/MotorCity/Track/8381/