Question

Two plane harmonic sound waves are expressed by the equations.
`y_(1)(x,t)-A cos (0.5 pi x-100 pit), y_(2)(x,t)=A cos(0.46 pix-92pi t)` (All parameters are in MKS) :
What is the speed of the sound :-
A. 200 m/s
B. 180 m/s
C. 192 m/s
D. 96 m/s

Answer 1

Correct Answer - A
Speed of wave
`v=(omega)/(R)=v=(100pi)/(0.5 pi)rArr(92pi)/(0.46pi)=200 m//s`