If the velocity of sound in air is 336 m/s. The maximum length of a closed pipe that would produce a just audible sound will be

Question

If the velocity of sound in air is 336 m/s. The maximum length of a closed pipe that would produce a just audible sound will be (A) 3.2 cm (B) 4.2 m (C) 4.2 cm (D) 3.2 m

Tardigrade Admin · Accepted Answer

Velocity of sound in air v=336 m / s. As we are quite well know that the lowest frequency of audible sound is 20 Hz. Hence maximum length of a closed pipe to produce just audible sound is given by l =(336/4 × v)=(336/4 × 20) =4.2 m

Q. If the velocity of sound in air is $336 m / s$ . The maximum length of a closed pipe that would produce a just audible sound will be

3.2 cm

4.2 m

4.2 cm

3.2 m

Velocity of sound in air $v = 336 m / s$ .
As we are quite well know that the lowest frequency of audible sound is $20 Hz$ .
Hence maximum length of a closed pipe to produce just audible sound is given by
$l = \frac{336}{4 \times v} = \frac{336}{4 \times 20}$
$= 4.2 m$

Q. If the velocity of sound in air is 336m/s. The maximum length of a closed pipe that would produce a just audible sound will be