What would be the wavelength of a sound wave in iron ? V = 4950 m/s. If its wavelength was 1.4 m in air in which its speed was 330 m/s

Options

A. 0.29 m
B. 17 m
C. 21 m
D. 18 m

Answer

C

Explanation

`(lamda_(2))/(lamda_(1)) = (v_(2))/(v_(1))`
`:. lamda_(2) = (v_(2))/(v_(1)) lamda_(1) = (4950 xx 1.4)/(330) = 21m`