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i A person hums in a wall and finds strong resonance at frequencies 60Hz 100Hz...

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Physics

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i A person hums in a wall and finds strong resonance at frequencies 60Hz 100Hz and 140Hz What is the fundamental frequency of the well Explain How deep is the wall veloci of sound 344m ii A violin string 33cm long vibrates at a fundamental frequency of 440Hz Where shold a finger be pressed on the string board so that its decreased length causes it to vibrate in its fundamental mode at five fourth of its original frequency

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