Mach is a function of temperature.
speed of sound 'a' or 'c' is a function of temp but not Mach which is a function of pressure height
at every pressure height there is a specific temperature and a specific speed of sound so that the T's cancel,...a Mach meter is built like and ASI
just as some of the natives in Oakland once insisted the local schools teach....in place of proper English
that's why I think the liberals can be just as racist and short sighted as conservatives
terrible
