Maybe this question has a very obvious answer (I'm no aero engineer though), but I'll appreciate the clarification! So, I was reading an old nasa paper that indicates that the dynamic pressure for the apollo's vehicle during reentry was about 120 lb/ft^2 for a Mach number of approx. 23, note that I'm getting this data from dynamic pressure vs. Elapsed time and Mach number vs elapsed time graphs. So I was thinking if I'm travelling at such high M number, why the pressure or rather the stresses on the vehicle aren't higher? Naively, I am thinking that the air pressure inside a car tire is about 2.1 bars which is approx. 2088 lb/ft^2 so I'm surprised by the pressure reported in the paper (see pages 35 and 36, figures 5 and 6 respectively) Here is the link to the paper: https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19670027745.pdf
Again thanks for the clarification!