In dry air at 20°C (68°F), the speed of sound is approximately 767 miles per hour (1,235 kilometers per hour).
However, here are some other factors that influence the speed of sound:
* Temperature: The speed of sound increases with temperature.
* Altitude: The speed of sound decreases with altitude because the air becomes thinner.
* Humidity: The speed of sound increases with humidity.
* Medium: The speed of sound is much faster in solids and liquids than in air.
Let me know if you'd like to know the speed of sound in a specific medium or under specific conditions.
