Find the number of possible natural frequencies of an air column in a pipe whose frequencies lie below 1250 Hz. The length of the pipe is 85 cm. The speed of sound is `340 ms^(-1)`. Consider the two cases: (a) the pipe is closed at one end and (b) the pipe is open at both ends.

Explanation

`v_n= (v)/(2l) (n+1)`, also six oscillations , Here n= 0,1,2,….