text: The highest frequency in empirical physics is the frequency of the electron rotating around the nucleus.\nHowever this is not the classic description of the pendulum.\nNor is the speed of sound.\nNow.. If I actually knew what your question was I may be able to answer properly.\nYour problem is your English is so poor you are not able to communicate properly.\nYou should focus on English at school.. Once you are able to communicate properly all your other questions will become very simple.