Holey Kowww.... this is why I quit arguing with teachers years ago....
OK, let's read it slowly....
really?
the tiny perturbations the sensors create allow Mach waves to attach.
At the critical speed the pressure shows a step over a short distance, the mass flow drops to zero.
The tube is still open but the silence is deafening.
No more screaming gas.
OK, let's read it slowly....
the mass flow drops to zero
really?