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Can “fundamental” properties of matter be artificially changed/altered?

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Can “fundamental” properties of matter be artificially changed/altered?

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(1) Can *fundamental* properties of substances be changed by external artificial means? Part of my thesis as a grad student in chemical engineering was predicting the temperature profile of a rod with convective & radiative losses. One end was embedded in a furnace and the rest was exposed to the air. My model was subsequently used by another grad student whose project was to verify that the thermal conductivity of the metal (rod) could be changed by applying ultrasonics to it. (I suspect this would facilitate improvements in some manufacturing process of the company that was sponsoring the research grant.) They already qualitatively knew this happened but needed to quantify and tabulate the results. Along the same lines, I seem to recall reading that certain EM fields could even change the decay rate of a radioactive substance. If that is true, then could it apply to a decay that produced an anti-particle? Artificially increase the decay rate and use the anti-particles immediately in

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