The frequency of the note F 4 is 349 Hz.
(a) If an organ pipe is open at one end and closed at the other, what length must it have for its fundamental mode to produce this note at 20.OoC?
(b) At what air temperature will the frequency be 370 Hz, corresponding to a rise in pitch from F to F#? (Ignore the change in length of the pipe due to the temperature change.)