"keithr"

They can't even get their physics right:-

" There is only one other place in nature where this caliber of accuracy
occurs - and that is when sound waves travel through air at constant speed
of Mach One."

Certainly sound waves travel at mach 1, but mach 1 is not a constant
speed, it depends on the density of the medium which is why you sound like
Mickey Mouse with a lung full of helium, and, in air, it varies with the
local temperature and pressure.


** The speed of sound (or Mach 1) varies with the temperature of air (or any
gas) alone - pressure and or density have NO effect.

At the altitudes where passenger jets cruise, the air is very cold so the
Mach 1 speed is lower than at ground level.

Fact is, a sound wave moves forward at a speed just below the average
molecular speed of the molecules of the gas - cold molecules move slower
as do heavier ones at the same temperature.



....... Phil