
1) Classical mechanics
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https://www.crosswordclues.com/clue/anharmonicity

Anharmonicity also modifies the profile of the resonance curve, leading to interesting phenomena such as the foldover effect and superharmonic resonance. == General principle == A generalized version of harmonic oscillator in which the relationship between force and displacement is linear. The harmonic oscillator is a highly idealized system that ...
Found on
http://en.wikipedia.org/wiki/Anharmonicity
No exact match found.