While I was teaching a high school biology student, she asked a simple question on diffusion and then I had to tell her about Brownian motion etc, following which we ultimately reached electrons! Now, classically, we are told that electrons move around nucleus. From where that energy comes? Do they get it /absorb it from Sunlight or heat? And how long can they continuously rotate? Why dont they just stop after loosing all the energy. Conversely, I want to ask, how much time an electron cloud can continue to rotate around a nucleus? Is there any temperature, or condition where they just stop? They must be loosing some kinetic energy and how so much ever small they may be , they must be losing it. Can be observe any evidence on earth? or in the laboratory?
Not a particle physicist by any stretch of the imagination, but I would think the strong nuclear force as being the 'culprit' to your question. I vaguely remember reading somewhere once that at 0 Kelvin atoms would fall apart due to total lack of kinetic energy (theoretical anyways).
Again, not a particle physicist, but I don't think subatomic particles are bound by things like drag, so they don't slow down over time (eg. we can measure light that was sent our way over 13 billion years ago).
Anyway, just my ramblings and (hopefully) logical reasoning here.
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