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Electrodynamics and magnetic momentum of Sun-like stars
[[Mod. note -- I think further discussion of the nature of Van der Waals
forces belongs over in our sister newsgroup sci.physics.research, so unless there's some direct relevance to astrophysics, this thread is now closed. -- jt]] On 9/28/2015 4:12 PM, jacobnavia wrote: Le 28/09/2015 05:09, David Staup a écrit : On 9/25/2015 9:19 PM, jacobnavia wrote: Static electricity could have an important role in planet formation and maybe star formation. van der waals forces not static electricity Interesting. 1) The cited article says: quote Although these experiments lacked formal controls to identify the precise clumping mechanism, it is apparently electrostatic. end quote 2) Van der waals forces are inherently electrostatic. Dipoles can pair with their dipoles attracting other similar molecules, so I do notunderstand the difference being made here. Van der waals forces ARE electrostatic... to get attraction you need opposite charges, not likely in this situatiom If you have dipolar molecules yes, you have opposite charges. If you have charge accumulation by mechanical input it is the same. chuckle 1 van der waal forces do not require dipoler molecules 2 charge accumulation by mechanical means does not provide opposite charges in the same material all of your salt crystals are either acquiring extra electrons or being stripped of them but not both at the same time. A static charge on the individual salt crystals would not facilitate clumping but quite the opposite. |
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