Garmaine Staff asked 2 years ago

What is the difference of air drag in ground level with let say moderate speeds like fast cars 200km/h to 400km/h with high speed vehicle reentry at high altitude where the air is so rarified. Making more simple is: {Low speed ( up to 0.5 mach ) + ground level air pressure )} ****versus**** { High speed ( 6- 7 km/s + air density at Kármán line.