Resonance occurs when the frequency of natural vibrations coincides with the frequency of an external force acting on the system. Resonance can be both beneficial and harmful. On the one hand, resonance allows you to tune musical instruments, determine the frequency of the oscillatory system, and amplify the signal. On the other hand, uncontrolled resonance in technology, building structures, electronics can lead to failure of the above.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.