29. If the speed of the wave shown below in the figure is 320 m/s, then its wavelength and frequency
are
x = 20 (cm)
(1) 8 cm, 400 Hz
(3) 8 cm, 4000 Hz
(2) 80 cm, 40 Hz
(4) 40 cm, 8000 Hz
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Answer:
the wavelength = x/number of waves = 20/2.5 = 8 cm. Frequency = Speed/Wavelength = 320/0.08 = 4000 Hz.
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