On 14/02/2008, Erik Max Francis <[EMAIL PROTECTED]> wrote: > 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). >
Thanks, my IQ just went up one zeptopoint. Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? -- http://mail.python.org/mailman/listinfo/python-list
