1. A segment A of wire stretched tightly between two posts a distance L apart vibrates in its fundamental mode with frequency f . A segment B of an identical wire is stretched with the same tension, but between two different posts. You observe that the frequency of the second harmonic of wire B is the same as the fundamental frequency of wire A . The length of wire B must be

A. 2L
B. 4L
C. 6L
D. 1L

2. A 2m long rope is stretched between two supports with a tension that makes the speed of transverse waves 50m/s. What is the wavelength of the fundamental tone?
A. 2m
B. 6m
C. 4m
D. 8m

3. A string of length 0.6 m is vibrating at 100 Hz in its second harmonic and producing sound that moves at 340 m/s. What is true about the frequency and wavelength of this sound?
A. The wavelength of the sound is 0.6 m.
B. The frequency of the sound is 100 Hz.
C. The frequency of the sound is 567 Hz.
D. The wavelength of the sound is 0.9 m.

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