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possible that each of the old ways to measure Plank's constant is now a way to create a realization of a mass measurement device: I don't know. I think this is far more than pedantry. It goes to the heart of the new definition of the kilogram and the way this new definition is to be applied in the real world. -
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An editor added an extensive section on determining the Plank constant. I reverted it because this is not longer how it works. If we need such a section at all, it will need some context first. After 2019, when you "measure" the Planck constant, you are actually calibrating your measurement device.
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the value of the kilogram is not "determined". It is defined. No laboratory procedure will change the value of the kilogram. The term you are looking for is "realization". There may be several ways to create a realization: i.e., actually measure the mass of something based on the definition. It's
828:. They are used by pharmaceutical companies today. They are described in the Kibble balance article. This is somewhat similar to the commercial laboratory devices that were developed for the second (atomic clocks) and for the meter (interferometers) when those units were redefined. -
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I'm sorry you saw that as "lecturing" you, and I apologize. I did not wish to offend, and I realize that you are genuinely trying to improve the article. I think we do need a section on the "realization" of the definition. I recommend we start with the one described by BIPM:
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I would prefer if we used the dmy format since it is a more international format used by most of the world. And I feel strongly about this case since this was the original format used in the article and was changed without a consensus. Thank you.
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If you can find any other descriptions of "realizations" using other techniques, then we can add them also. In particular, there are now commercially-available devices using an approach similar to the
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To be sure, that text was in Planck constant and maybe it needs more work and I think it is too long. But the current article has only one sentence on how the value of the kilogram is determined.
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Since 2019 the kilogram is defined in terms of the Planck constant. Thus to determine the kilogram you apply the technology previously used to determine the Planck constant.
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The mixture of UK spelling with US dates is weird. I would support a change to either UK spelling + UK date or US spelling + US date. I don't mind which.
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we should use the original date format, which is dmy, despite it having been changed in 2014 to mdy (without any discussion or consensus).
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I have no objection to the change you propose. Perhaps we can then add a "this article uses dmy format" banner on the talk page?
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This ref covers the details: Wolfgang
Ketterle, Alan O. Jamison; An atomic physics perspective on the kilogram’s new definition.
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The data format has been set since at least 2014. Please discuss in the Talk:Kilogram if you feel strongly this should change.
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The article needs work to explain how the value of a kilogram is now measured, determined, or realized, your choice.
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Thanks for your efforts. This is a trivial issue, but I thought you would like to see the reference. -
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I was looking at reference 3 and it appears that this link no longer works. Can this be changed to
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No need to lecture me, esp. in a paragraph where you say "I don't know".
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Use "an", not "a", prior to an initialism based on how it is pronounced.
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Sorry I think you misread the text you reverted. The first sentence:
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or does it need to be a PDF since springer is pay-walled for some.
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Since you did not like my addition, what do you propose?
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