Q. Velocity of sound in air is
A) Faster in dry air than in moist air
B) Directly proportional to pressure
C) Directly proportional to temperature
D) Independent of pressure of air
Explanation
(d) $v = \sqrt{\frac{\gamma P}{\rho}}$; as $P$ also changes, $\rho$ also changes. Hence $\frac{P}{\rho}$ remains constant so speed remains constant
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.