Two plane harmonic sound waves are expressed by the equations:y1 (x,t)=Acos(0.5πx-100πt)y2 (x,t)=Acos(0.46πx-92πt)All the parameters are in mks system. How many times does an observer hear maximum intensity in one second?

Two plane harmonic sound waves are expressed by the equations:y1 (x,t

1.	Two plane harmonic sound waves are expressed by the equations:y1 (x,t)=Acos(0.5πx-100πt)y2 (x,t)=Acos(0.46πx-92πt)All the parameters are in mks system. How many times does an observer hear maximum intensity in one second?
A.	4
B.	6
C.	8
D.	10
Answer» B. 6