A vertical tube closed at its lower end contains an air column of length 0.75m. The column resonates in its fundamental mode at room temperature where the speed of sound is 340ms−1.
(a) Fundamental frequency for 0.75 m closed pipe.
(b) Fundamental frequency after water reduces length.
(c) Second overtone frequency for 0.45 m open pipe.
(d) Comparison and ratio of frequencies.