Physics for IGCSE & O level - Waves And Sounds (Section 1 - No. 39)
If a sound wave has a frequency of 500 Hz and a wavelength of 0.66 m, what is its speed?
330 m/s
751.5 m/s
1330 m/s
499.3 m/s
คำอธิบาย
Speed = frequency x wavelength = 500 Hz x 0.66 m = 330 m/s