Talk:Physical constant
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Ok since I received a question about the detail of my edit:
I agree that I should have splitted the updates... I'll know better next time. Here are my changes beside layout and grouping changes:
- add Plank temperature
- add conductance quantum and resistance quantun
- add Josephson constant and magnetic flux quantum
- add von Klitzing constant
- add equation for Bohr radius
- add equation for electron g factor and use new value
- rename magnetic moment of protons in H20 and use new value
- rename proton resonance frequency per field in H20 and use new value
- add equation for Rydberg constant
- add equation for Boltzmann constant and Faraday constant
- add equation for first radiation constant and second radiation constant
- add equation for Stefan-Boltzmann constant
Azhyd 22:29, Jul 10, 2004 (UTC)
- Hi Azhyd, thanks for the information. What are the new names of magnetic moment of protons in H20 and proton resonance frequency per field in H20 ? Also, what is the source of the new values for those two and electron g factor ? Thanks for your help. Wile E. Heresiarch 01:43, 11 Jul 2004 (UTC)
- All my values and constants come from the NIST site. The new names are respectively "proton magnetic moment to Bohr magneton ratio" (which I later removed since I think all those ratio would be clutter) and "proton gyromagnetic constant" divided by 2pi. Azhyd 04:49, Jul 11, 2004 (UTC)
- Great. Thanks for the info, and thanks for all your work on the article. Regards, Wile E. Heresiarch 16:22, 11 Jul 2004 (UTC)
Hello. I was comparing the table in the article to the 2002 CODATA values at NIST [1] (http://physics.nist.gov/cuu/Constants/Table/allascii.txt). I can't identify a couple of the table items. (1) IS "magnetic moment of protons in H20" in the article the same thing as "shielded proton magn. moment to Bohr magneton ratio" in the NIST CODATA list? (2) Is "proton resonance frequency per field in H20" the same thing as "shielded proton gyromagn. ratio over 2 pi" in the NIST CODATA list? Thanks for any light you can shed on this. Happy editing, Wile E. Heresiarch 03:12, 10 May 2004 (UTC)
It is impossible to access the link to "Planck's constant" & "Dirac's constant"
the 1/2 (square root) on plank mass, length, time are unclear
Usually article titles are singular, but since this page is a list, I moved it to the plural. (It was already listed in the plural in the list of physics topics, and the plural page redirected to the singular). Michael Hardy 16:10, 5 Jan 2004 (UTC)
The list is getting rather long. Would it benefit from being sorted alphabetically or does it work better sorted by category? --Xwu 19:58, 9 Mar 2004 (UTC)
- Lets not have categories inside a table. Sort alphabetically.Jay 04:30, 10 Mar 2004 (UTC)
- Personaly, i prefer it catogarised, at least it helps in finding out what a constant is used for, oh, and the fact that lists are one of my pet hates ;-) tooto 13:54, 2 Oct 2004 (UTC)
What does the 4th column "Ref." in the table mean ? Jay 04:30, 10 Mar 2004 (UTC)
Please, I meet Jay in the 4th column question. gl:user:Agremon
It refers to the references section: a is for the first reference (and they could be more later.
But they all come from the same reference, which is the BEST one. I propose dropping the Reference column, because in all cases the column is constant. 64.165.202.231 04:20, 31 Jan 2005 (UTC) This will also make the formating better.
- Amen. Gene Nygaard 05:19, 31 Jan 2005 (UTC)
Avogadro's number and acceleration due to gravity on earth aren't physical constants, are they? Avogadro's number is a conversion factor between atomic mass units and grams, and acceleration due to gravity on earth is only constant on earth.
Table format
Can someone who knows about this stuff make the tables work better? With the math in column 2, my browser makes that far too wide, and the stuff in column 3 is a jumbled mess, split numbers and split units of measure, etc. Gene Nygaard 22:22, 1 Jan 2005 (UTC)
Scientific American Article
The article here [http://www.sciam.com/article.cfm?chanID=sa006&articleID=0005BFE6-2965-128A-A96583414B7F0000&pageNumber=1&catID=2 Inconstant Constants in the June 2005 Scientific American has interesting information about the changing of physical constants.