speed of sound
Speed at which sound travels through a medium, such as air or water. In air at a temperature of 0°C/32°F, the speed of sound is 331 m/1,087 ft per second. At higher temperatures, the speed of sound is greater; at 18°C/64°F it is 342 m/1,123 ft per second. It is also affected by the humidity of the air. It is greater in liquids and solids; for example, in water it is about 1,440 m/4,724 ft per second, depending on the temperature.
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