The sound box of a musical instrument is so constructed that the air column inside it has a natural frequency …………… that of the string stretched in it.

1. greater than
2. smaller than
3. equal to
4. cannot say

(a) Name one factor on which the frequency of sound emitted due to vibration in an air column depends.

(b) How does the frequency depend on the factor stated in part (a)?

How does the frequency of sound given by a stretched string depend on its (a) length, (b) tension?

A tuning fork is vibrating in air. State whether the vibrations are natural or damped.