# Speed of Sound MPH?

The speed of sound in dry air that is at 20 degrees Celsius is 768 mph. This is usually the distance that is travelled by a wave of sound in a unit time through an elastic medium. The speed of sound depends on the substance where it travels faster on liquids and solids than in air.
The speed of sound varies depending on the temperature, pressure, and density of the medium through which the sound waves travel. For dry air at sea level at 68° F, the speed of sound is 767 miles per hour, or 1235 km/h
At sea level, the speed of sound is about 761 miles per hour (1225 kilometers per hour)
The speed of sound will vary depending on the temperature of the elastic medium. In dry air, the speed of sound is 768mph. Any good pilot could answer what happens when you travel faster than sound.
Q&A Related to "Speed of Sound MPH?"
 The speed of sound in miles per hour is about 761 mph. Now you talk about fast! I bet you sound would smoke Dale Earnhardt before he could press the gas. http://answers.ask.com/Science/Physics/what_is_the...