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seen Oct 9 at 20:58

Oct
2
comment Energy Stored In A Capacitor (Slowly Moving Parallel Plates Together)
@DavidZ Thanks David, I appreciate the suggestion and have taken your advice.
Oct
2
revised Energy Stored In A Capacitor (Slowly Moving Parallel Plates Together)
Explanation as to why this question is not a duplicate, plus more information corroborating Alfred Centauri's answer.
Oct
2
comment Energy Stored In A Capacitor (Slowly Moving Parallel Plates Together)
I see I'm in the minority on this one. I still retain my original viewpoint that the answer posed by Alfred Centauri below which points out my mistake and the inherent paradox in the question are not addressed in the other post mentioned, and so this post should not be closed as a duplicate. It looks, however, as if many other people disagree.
Oct
2
accepted Energy Stored In A Capacitor (Slowly Moving Parallel Plates Together)
Oct
2
comment Energy Stored In A Capacitor (Slowly Moving Parallel Plates Together)
Wow, thanks. I found this confusing. It seemed much more natural to assume that the work done would be a result of the total electric field at the location of the moving plate. It seems that by Newton's third law, an object cannot exert a net force on itself (meaning that the moving plate cannot do work on itself).
Oct
2
comment Energy Stored In A Capacitor (Slowly Moving Parallel Plates Together)
@CarlWitthoft I'm not sure I understand what you're saying. I read the other post, and they do not mention energy. However, the above question concerns energy.
Oct
2
comment Energy Stored In A Capacitor (Slowly Moving Parallel Plates Together)
@CarlWitthoft That post does not address the concept of energy.
Oct
2
awarded  Citizen Patrol
Oct
2
asked Energy Stored In A Capacitor (Slowly Moving Parallel Plates Together)
Oct
6
awarded  Editor
Oct
6
revised Electron Incident On A Finite Potential Barrier
removed the phrase "minus infinity"
Oct
6
comment Electron Incident On A Finite Potential Barrier
Thanks, that's a good idea. After substituting in, I'm getting $k_{left}=6.2746\times10^{-9}\;m^{-1},$ $k_{right}=3.62264\times10^{-9}\;m^{-1},$ and $|D|^2+|G|^2=1.67949|C|^2,$ so I must have made a mistake somewhere...
Oct
6
asked Electron Incident On A Finite Potential Barrier
Sep
23
accepted Length Contraction And Simultaneity
Sep
23
asked Length Contraction And Simultaneity
Sep
8
awarded  Scholar
Sep
8
awarded  Supporter
Sep
8
accepted Rotating/Translating Disk
Sep
8
comment Rotating/Translating Disk
Thanks Ron. I wasn't actually stuck on conservation of energy, but rather conservation of momentum. Your answer helped, though. If the same impulse is applied in both cases, the disk acquires rotational as well as translational momentum in one case, but only translational momentum in the other case. But I guess if you look at the rotational momentum of the disk as if it were translational momentum (by summing up each part of the disk), then it would actually be zero. Does that make sense? I upvoted your answer!
Sep
8
awarded  Student