Answer:
speed of sound in unknown gas will be 360m/sec
Explanation:
We have given length of the pipe l = 0.770 m
It is given that pipe is open at one end and closed at one end
Frequency of third harmonic f = 750
Third harmonic frequency of pipe which one end is open and one end is closed is given by
[tex]f=\frac{5v}{4L}[/tex], here v is the speed of the sound, L is the length of the pipe
So [tex]750=\frac{5v}{4\times 0.770}[/tex]
v = 360 m /sec
So speed of sound in unknown gas will be 360m/sec
