At 18:47 2001-02-27 -0500, you wrote:
>For that matter, force cannot be directly measured. Nor can time.
>Electric current could be measured directly if one could measure time
>and could count individual elementary charges passing a gate. The
>latter two quantities are also part of the "magnificent seven" whose
>units provide the base set in SI.
Yes, exactly! These are fundamental properties.
Measurement of them can only be indirect.
In a way, there's a tie-in to Gödel's theorem that no formal system (in
mathematics) can prove itself. Here we have basic physical concepts upon
which the rest of mechanics is based.
Well, let's see if anyone else catches on. Sorry to have gotten off topic,
though it's not far off topic.
- John Tauxe
