1. WHAT IS resonance
2. whAT to frequncy of a sound when a car approaches
How is resonance used? One kind of resonance is chemical resonance in which several structures can be drawn to represent a compound an the "real" structure is a hybrid of all of the possible structures. Another kind of resonance occurs, for example, when a sound resonates in a cavity. Your second question doesn't make sense. I think you omitted some of the words.
I don't know how this happened but I posted the above response although it says Anonymous posted it.
No problem! I can help clarify the concept of resonance for you.
1. Resonance refers to the phenomena of a vibrating system or object absorbing energy from another vibrating system or object that has a matching or similar natural frequency. When two objects have the same frequency, the energy transfer between them becomes more efficient. This causes the amplitude of the vibrations to increase, resulting in resonance.
To understand resonance, consider a swing on a playground. When you push the swing at a regular interval that matches its natural frequency, the amplitude of the swinging motion becomes larger. This is an example of mechanical resonance.
In terms of sound, resonance can occur when the natural frequency of an object matches the frequency of a sound wave. This can cause the object to vibrate more strongly, amplifying the sound. For example, when a singer can shatter a wine glass by singing a specific note. Here, the sound wave resonates with the natural frequency of the glass, causing it to vibrate and eventually break.
2. It seems like there might be some missing information in your second question. "whAT to frequncy of a sound when a car approaches" is not clear. Could you please provide more details or rephrase the question?