Physics for IGCSE & O level - Waves And Sounds (Section 7 - No. 1)
If the speed of sound in air is 330 m/s, and a sound has a frequency of 110 Hz, what is its wavelength?
0.33 m
1 m
3 m
33 m
คำอธิบาย
wavelength = speed/frequency = 330 m/s / 110 Hz = 3 m.