I. Temperature.
II. Density of air molecules
...
I. Temperature.
II. Density of air molecules
III. Pressure
IV. Pitch
Which of the above will affect the velocity of sound in the air
I and II only
II and IV only
I,II and IV only
I,II,III and IV
Correct answer is A
Air pressure has no effect on speed of sound in an ideal gas because pressure and density both contribute to sound velocity equally, the two effects cancel each other out