18 Oct
1998
18 Oct
'98
1:17 p.m.
< Here in the US, it's rare to see nanoFarads used as a unit - it's
< far more common to see a 2.2nF capacitor referred to as a 0.0022uF
< or as a 2200pF unit. This is an extension of the days when
< "microFarad" was "mF", and the next subdivision was
"micro-micro-Farad"
< or "mmF".
I have a lot of cap on drawing I've specified as nF and I switched to
pF (picofarards 10^-12) back in the late 60s.
< I believe that "mmg" is still used as a prefix in medical fields,
< but here it means (as far as I can figure out) "millimicrogram".
< Can someone correct me on this (I'm sure I'm wrong!)
A friend is a toxicologist and with it isn't PPM it's picograms/liter.
Allison