why sound travel faster in moist air than in dry air?
Raza Asks:
“Why sound travel faster in moist air than in dry
air?”
Answer:
The density of dry air is more than that of moist air (Wonder why? Just answer me – which is denser – skimmed milk or fresh milk. The cream is lighter and when removed from milk, we get skimmed milk and therefore skimmed milk will be denser than the fresh one with cream content. Just like that the water vapor is lighter than dry air. When moisture is removed from air, its density increases). The speed of sound in a medium is inversely proportional to the square root of its density. Therefore, the speed of sound in moist air is more than that in dry air.
Categories: Ask Physics, Sound, Waves Tags: density
Doppler Effect
Hasan asks:
“What is Doppler Effect?”
Answer:
Doppler Effect is the apparent change in frequency of a wave due to the relative motion between the source and the listener.
(Please come back soon for more details with figures and videos)
Categories: Ask Physics, Sound, Waves Tags: doppler effect, frequency, relative motion, sound
