Question

write the relation of the quantity that determine pitch with wavelength and velocity of a wave

Answer 1

Pitch is directly proportional to the ratio of velocity and wavelength

Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale.

Hence,

Pitch ∝ frequency

But we know that frequency is defined as the ratio of velocity and wavelength,

frequency = velocity/wavelength

hence

pitch ∝ frequency = velocity/wavelength

Hence pitch is directly proportional to the ratio of velocity and wavelength