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Parametric Resonance is when one parameter of an oscillator is varied at the right frequency to cause the amplitude to increase. Autoparametric Resonance is when that happens automatically!
Here's my video on resonance: https://youtu.be/dihQuwrf9yQ
Here's my video about an upside down pendulum: https://youtu.be/gnn21smGVrQ
Here's my video about a levitating liquid pendulum: https://youtu.be/gMAKamGIiMc
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