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Why do sound waves travel faster in low- density gas?
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Why do sound waves travel faster in low- density gas?

User Atams
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In a gas, it is particularly important to know the temperature. This is because at lower temperatures, molecules collide more often, giving the sound wave more chances to move around rapidly. At freezing (0º Celcius), sound travels through air at 331 meters per second (about 740 mph).
User RailsEnthusiast
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Answer:

Because the molecules of matter in a gas are spaced far apart, sound moves slowest through a gas. Sound travels faster in liquids than in gases because molecules are packed more closely together.

Step-by-step explanation:

User Ricardo Pietrobon
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