I. Temperature.
II. Density of air molecules
III. Pressure
IV. Pitch
Which of the above will affect the velocity of sound in the air
A
I and II only
B
II and IV only
C
I,II and IV only
D
I,II,III nad IV
Verified Correct Answer: A.
Physical Principles & Numerical Solution
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
Source: Myschool Past Questions Archive (Record #9680)