Wikipedia says, "When used as a unit of energy, the numerical value of 1 eV in joules (symbol J) is equivalent to the numerical value of the charge of an electron in coulombs (symbol C)."
But a coulomb is not a unit of energy so how is that equivalent?
The numerical values are the same. 1 eV / (1 J) = e / (1 C). ? David
Forget about it Tom, it's Wikipedia.
Have you never found errors in Wikipedia? I checked a reference once and found the Wikipedia text that used the reference said EXACTLY THE OPPOSITE of what the reference said!!!
There is a reason why you can't use a Wikipedia article as a reference for another Wikipedia article.
David Nadlinger wrote in news:r4tgfd$lkc$ snipped-for-privacy@news.ox.ac.uk:
Looks like you Leyden-ed it all out for him. :-)
Rick C wrote in news: snipped-for-privacy@googlegroups.com:
How big is the volume that one mole of wikipedia articles takes up?
How many angels at the head of a pin?????
Sjouke Burry wrote in news:5e72641a$0$1601$ snipped-for-privacy@textnews.kpn.nl:
Depends on their charge.
Not even two if both positive or both negative. Exactly two if both opposite.
Cannot be zero charge.
A coulomb is an unit of charge, charge * voltage = energy. The V in an eV is a volt.
Thanks. Now I get what they meant to say, but what they said is not equivalent grammatically.
So eV is a product of units. I hadn't realized (or remembered) that, but it's consistent with 1C*1V=1J
Thanks.
Depends on how deep the mole has dug.
A product unit is not unheard of, think about 1 Nm for torque and 1 VA for reactive power.
It is 1.602e-19 J, related to other weird particle units, like a barn (1e-28 m2).
A barn was defined on a whim. The eV wasn't.
Anyway, most units are combinations of several of the seven base units. Even the volt is in fact such a combination, sufficiently important to get its own name.
Jeroen Belleman
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