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A 1.20 m long column of air in a pipe organ, that is closed on only...

A 1.20 m long column of air in a pipe organ, that is closed on only one side, plays its very low fundamental frequency. If the temperature of the air is 22.4 degC, what is that frequency?

   

A string of length 0.0140 m is pulled across the top of the column of air, and causes it to vibrate in its 2nd overtone, what is the velocity of the wave on the string?

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