Help make Alexa smarter on Alexa Answers. Sign in with Amazon

Science

How fast is the sound barrier in miles per hour?


The speed of sound in air at 68 degrees Fahrenheit is 768 miles per hour. The speed of sound in air depends on temperature, so at higher altitudes where air is colder, sound moves more slowly. For example, at an altitude of 30,000 feet, the speed of sound is about 678 miles per hour.

{{ relativeTimeResolver(1570510287324) }}

LIVE
Points points 57
Rating

Similar Questions
Sign in to view all similar questions

Join Alexa Answers

Help make Alexa smarter and share your knowledge with the world

LEARN MORE