11. If forced frequency is equal to the natural frequency , the amplitude of vibration increases manyfold. 12. The muscles retune the natural frequency of the leg, 13. This is a property of the system's natural frequency . 14. The eigenvalues provide the natural frequencies of the system. 15. All objects including rotating machinery exhibit natural frequency depending on the structure of the object. 16. Every vibrating system has one or more natural frequencies that it vibrates at once disturbed. 17. Natural frequencies depend " only " on network topology and element values but not the input.18. The critical speed of a rotating machine occurs when the rotational speed matches its natural frequency . 19. Although resonant frequency is generally used synonymously with natural frequency , there is in fact a distinction. 20. When an outside source applies forced vibration that matches a string's natural frequency , the string vibrates.
