5. Waves and Sound

Standing Waves — Quiz

Test your understanding of standing waves with 5 practice questions.

Practice Questions

Question 1

Which of the following describes the relationship between the length of a string ($L$) and the wavelength ($\lambda$) for the fourth harmonic on a string fixed at both ends?

Question 2

A standing wave in a pipe open at both ends is vibrating at its third harmonic. If the length of the pipe is $L$, what is the wavelength ($\lambda$) of the standing wave?

Question 3

A standing wave in a pipe closed at one end and open at the other is vibrating at its fifth harmonic. If the length of the pipe is $L$, what is the wavelength ($\lambda$) of the standing wave?

Question 4

A string of length $0.8 \text{ m}$ is fixed at both ends. If the speed of the wave on the string is $160 \text{ m/s}$, what is the frequency of the third harmonic?

Question 5

A tube open at both ends has a length of $0.75 \text{ m}$. If the speed of sound in air is $340 \text{ m/s}$, what is the second harmonic frequency of the air column?