Which phenomenon explains why sound travels faster in warm air than in cold air?
A
Warm air molecules have less energy
B
Warm air molecules move faster providing quicker transmission
C
Cold air is denser blocking sound
D
Sound speed is unaffected by temperature
Correct Answer: Option B — Warm air molecules move faster providing quicker transmission
Explanation:
In warmer air molecules have more kinetic energy and move faster which allows sound waves to be transmitted more quickly giving sound a higher speed in warm compared to cold air.