https://eng.libretexts.org/Bookshelves/Electrical_Engineering/Electro-Optics/Book%3A_Continuum_Electromechanics_(Melcher)/01%3A_Introduction_to_Continuum_Electromechanics/1.04%3A_Dynamical_Processes_and_Characteristic_Times
1.4: Dynamical Processes and Characteristic Times - Engineering LibreTexts
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