Some1 plz explain this thing on sound?

Question

Wat will the sound b like when the following are forks r vibrating?
1- short fork with box underneath
2- short fork with no box
3- long fork with box
4- long fork with no box

Answer 1

A box under a tuning fork resonates (picks up the vibrations of the fork). This allows more energy to be transmitted through air which is easier to hear. A short fork likely has a higher pitch than a long fork because the tines having less mass will vibrate more times per second.