- #36
mheslep
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In addition to pointing out (as cited earlier) that energy is a 'concept' about which we find certain abstractions hold in all known circumstances, Feynman also http://sites.google.com/site/physics121rochester/physics-phacts/feynmanonconservationofenergy" in that same text:
RP Feynman said:It is important to realize that in physics today, we have no knowledge of what energy is. We do not have a picture that energy comes in little blobs of a definite amount. It is not that way. [...] It is an abstract thing in that it does not tell us the mechanism or the reasons for the various formulas.
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