Convert from mile/hour (mph) to speed of sound [air]

Unit Definition (mile/hour (mph))
Mile per hour is a common measurement of speed or velocity. At a constant speed of 1 mile per hour, exactly 1 mile distance would be covered in 1 hour.

Unit Definition (speed of sound [air])
The speed of sound c (from Latin celeritas, "velocity") varies depending on the medium through which the sound waves pass. It is usually quoted in describing properties of substances (e.g. see the article on sodium).