What is the distance between two ends of open pipe vibrating in the 3rd overtone?

At the open end of organ pipe

A closed organ pipe of length L and an open organ pipe contain gasses of densities rho_(1) and rho_(2) , respectively. The compressibility of gasses are equal in both the pipes. Both the pipes are vibrating in their first overtone with same frequency . The length of the open organ pipe is (a) (L)/(3) (4l) / (3) (c ) (4l)/(3)sqrt((rho_(1))/(rho_(2))) (d) (4l)/(3)sqrt((rho_(2))/(rho_(1)))

A string of length 'L' is fixed at both ends . It is vibrating in its 3rd overtone with maximum amplitude 'a'. The amplitude at a distance L//3 from one end is

An organ pipe P_1 closed at one end and vibrating in its first overtone, and another pipe P_2 open at both ends and vibrating in its third overtone, are in resonance with a given tuning fork. The ratio of the length of P_1 to that of P_2 is

Compare the length of a closed organ pipe and an open organ pipe, if the second overtone of the open pipe is unison with the second overtone of the closed organ pipe.

An organ pipe A closed at one end vibrating in its fundamental frequency and another pipe B open at both ends is vibrating in its second overtone are in resonance with a given tuning fork . The ratiio of length of pipe A to that of B is

A sound wave travelling along an air column of a pipe gets reflected at the open end of the pipe. What is the phase difference between the incident and reflected waves at the open end?

The distance between 4th and 3rd Bohr orbits of He^(+) is :

An organ pipe open at one end is vibrating in first overtone and is in resonance with another pipe open at both ends and vibrating in third harmonic. The ratio of length of two pipes is–

The frequency of the first overtone of a closed organ pipe is the same as that of the first overtone of an open pipe. What is the ratio between their lengths ?