1. If amplitude is determined by the amount of vibration of molecules, do solids have a smaller amplitude compared to air?
    Reason such is because molecules in a solid are dense and vibrate little whereas those in air vibrate comparably more as it is not at all dense… So which has a greater amplitude?

  2. nice work. i am working on one such project by which we can convert the gravitational energy in to electrical energy. so we need to run behind the sources of power like rivers, oceans, sun and other geographical locations. looking forward to have some collaboration in this project.

  3. I wanted to show this video to my students but there is an error as CogitoErgoCogitoSum has noted. Sound energy depends on frequency (or angular frequency) as well. It makes sense because a higher frequency wave has more oscillations during a set interval than a lower frequency wave. For reference, http://www.physnet.org/modules/pdf_modules/m203.pdf

    In this paper omega, the angular frequency, is proportional to the frequency, so the dependence is squared just like it is for the amplitude.

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