Physics

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The fundamental of an organ pipe that is closed at one end and open at the other end is 261.6 Hz ( middle C ). The second harmonic of an organ pipe that is open at both ends has the same frequency. What are the lengths of the pipe?
I tried solving it and I got 0.65 and 0.98 and they are wrong .. how can I solve it :S

• Physics -

What speed of sound are you assuming?

• Physics -

Solved it thank you

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