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Nowadays it's all piezo.

It is useful to point out that everything we do is electronic in some way. All normal forces are really electronic forces. It just isn't the case that we can't observe forces other than EM, just that in the end everything has to become EM for us to be able to observe it, and... that's not too remarkable considering that we're made of electronic matter and are of such scales that nuclear forces are not relevant except in so far as they make chemistry possible.




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