Concept explainers
The Speed of Sound in Gases
When sound travels through a gas, its speed depends primarily on the density of the medium. The less dense the medium, the faster the speed will be. The following table shows the approximate speed of sound at 0 degrees centigrade, measured in meters per second, when traveling through carbon dioxide, air, helium, and hydrogen.
Medium | Speed (Meters per Second) |
Carbon dioxide | 258.0 |
Air | 331.5 |
Helium | 972.0 |
Hydrogen | 1,270.0 |
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