5. On a day when the speed of sound in air is 345 m/s, the fundamental frequency of an open-ended organ pipe is 690 Hz. If the second harmonic of this pipe has the same wavelength as the second overtone (third harmonic) of a closed-end pipe, what is the length of each pipe?

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5. On a day when the speed of sound in air is 345 m/s, the fundamental frequency of an open-ended organ pipe is 690 Hz. If the second harmonic of this pipe has the same wavelength as the second overtone (third harmonic) of a closed-end pipe, what is the length of each pipe?
4. A visitor to a lighthouse (on earth) wishes to determine the height of the tower. She
ties a spool of thread to a small rock to make a simple pendulum, which she hangs down
the center of a spiral staircase of the tower. The period of oscillation was 9.40 s. What is
the height of the tower?
5. On a day when the speed of sound in air is 345 m/s, the fundamental frequency of an
open-ended organ pipe is 690 Hz. If the second harmonic of this pipe has the same
wavelength as the second overtone (third harmonic) of a closed-end pipe, what is the
length of each pipe?
Transcribed Image Text:4. A visitor to a lighthouse (on earth) wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, which she hangs down the center of a spiral staircase of the tower. The period of oscillation was 9.40 s. What is the height of the tower? 5. On a day when the speed of sound in air is 345 m/s, the fundamental frequency of an open-ended organ pipe is 690 Hz. If the second harmonic of this pipe has the same wavelength as the second overtone (third harmonic) of a closed-end pipe, what is the length of each pipe?
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