Bjoern Schliessmann wrote: > eV has a advantages some "kilogram force" hasn't: It's on completely > different order of magnitude. People aren't happy writing 81.8 aJ > (Attojoule = 1e-15 Joule), instead they prefer > 511 keV.
A couple of problems here. 1 eV = 1.602 x 10^-19 J. Also, the atto- prefix is 10^-18, not 10^-15. So 511 keV = 81.9 fJ (femtojoules). (All values to three significant figures.) If you want to deal with a unit on the order of the size of the electron-volt, then you have to one rung down from even atto-, which is (wait for it) zepto-. The electron-volt is about 160 zJ (zeptojoules). -- Erik Max Francis && [EMAIL PROTECTED] && http://www.alcyone.com/max/ San Jose, CA, USA && 37 18 N 121 57 W && AIM, Y!M erikmaxfrancis You are the lovers rock / The rock that I cling to -- Sade -- http://mail.python.org/mailman/listinfo/python-list
