A stretched elastic string of length 1.2 m is held firmly at both ends. It is made to oscillate so that a standing wave is set up in the first harmonic mode at a frequency of 440 Hz.
a. a Determine the speed at which waves travel along the string. Give your answer to an appropriate number of significant figures.
b. b What are the wavelengths and frequencies at which the following harmonics will occur?
- i second harmonic
- ii third harmonic
- iii n th harmonic
c. c If you listened to the vibrating string, what would the wavelength of the sound be? (The speed of sound in air is 330 ms−1 .)