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Chapter 17: Q8. (page 483)

a. What are the three longest wavelengths for standing waves on a 240-cm-long string that is fixed at both ends? b. If the frequency of the second-longest wavelength is 50 Hz, what is the frequency of the third-longest wavelength?

Short Answer

Expert verified

a) 480cm, 240cm and 160 cm.

b) Data inadequate

Step by step solution

01

Given Information

We have a standing wave on a string 240cm long that is fixed at both ends.

02

Part a:

If m = 1, wavelength = 480cm

If m = 2, wavelength = 240cm

If m = 3, wavelength = 160cm

03

Part b:

Frequency of third longest wavelength is not related to frequency of second longest wavelength and so it can have any value depending on the tension in string.

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