You visit a national park with your friend one weekend. You encounter an old railroad tunnel...

You visit a national park with your friend one weekend. You encounter an old railroad tunnel which is very dark and you are not sure if the tunnel is blocked on the other end. You happen to have a frequency generator app on your cell phone frequency. You decide that to generate resonances in the tunnel with your app. You hear successive resonances at 55Hz, 57.5 Hz, 60Hz, 62.5 Hz …etc. (I) Can you use this information alone to determine if the tunnel opened or closed at the other end? (II) What is the length of the tunnel? (III) What is the maximum number of resonances you can produce in this tunnel between 50 Hz and 100 Hz? Use 343.0 m/s for the speed of sound in air. (

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genius_generous answered 1 year ago

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