Coulomb's law is strict:
$F=k\dfrac{q_1*q_2}{r^2}$
that means that between two charges occurs force. I.e. occurs force on $q_1$ and on $q_2$.
If there are two electrons in vacuum with 300 00 000 meters distance between them, one electron feels force due to another, and another should instantly feel force due to first electron.
How does it possible? You probably will say something about energy propagation, speed of light, but it is not actually a light. Does it occurs instantly or not, and why?
The general idea of this question is the fact that there are limits only for propagation of changable processes, as far as I know(like em waves). Coulomb's force is about two fixed charges in vacuum, there are no moving.
And the second idea -, even if, let's say, there is a need in time to one electron affect another - when it happens, first electron, according to law above, should instantly feel force.
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