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Question 70
F

A sound wave has a frequency of 800 Hz in a liquid. It passes into air, where its speed is 320 m/s.

Which gives the number of complete vibrations in 0.25 s and the wavelength in air?

[1]
A

200200200 vibrations and 0.40 m0.40\ \mathrm{m}0.40 m

B

200200200 vibrations and 2.5 m2.5\ \mathrm{m}2.5 m

C

320032003200 vibrations and 0.40 m0.40\ \mathrm{m}0.40 m

D

320032003200 vibrations and 2.5 m2.5\ \mathrm{m}2.5 m

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4 Waves Questions

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