Timeline for Why is the kilogram the last SI unit which is defined in terms of a physical prototype? [duplicate]
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11 events
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| Aug 10, 2016 at 13:50 | comment | added | Emilio Pisanty | @fauve, btw, see my edited answer in the duplicate. | |
| Aug 10, 2016 at 1:33 | history | closed |
BowlOfRed CuriousOne CommunityBot |
Duplicate of Why do we still not have an exact (constants-based) definition for a kilogram? | |
| Aug 9, 2016 at 23:45 | comment | added | R. Rankin | Wen we have a quantum theory of gravity, I would expect the kilogram to be redefined as your question suggests. | |
| Aug 9, 2016 at 23:35 | review | Close votes | |||
| S Aug 10, 2016 at 1:35 | |||||
| Aug 9, 2016 at 23:07 | answer | added | Emilio Pisanty | timeline score: 4 | |
| Aug 9, 2016 at 22:58 | comment | added | Paul | The most promising constant to redefine the kilogram is the planck constant. In order to do so, the planck constant has to be related to the kilogram prototype and that turned out to be rather difficult. Recently, there has been some progress though, see for instance the following Nature News item: nature.com/news/kilogram-conflict-resolved-at-last-1.18550 | |
| Aug 9, 2016 at 22:56 | history | edited | Emilio Pisanty | CC BY-SA 3.0 |
Language fixes.
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| Aug 9, 2016 at 22:53 | comment | added | Qmechanic♦ | Possible duplicates: physics.stackexchange.com/q/32120/2451 and links therein. | |
| Aug 9, 2016 at 22:52 | history | edited | Qmechanic♦ |
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| Aug 9, 2016 at 22:52 | review | First posts | |||
| S Aug 10, 2016 at 1:35 | |||||
| Aug 9, 2016 at 22:48 | history | asked | fauve | CC BY-SA 3.0 |