# Pressure Change in Supersonic Wind Tunnel [closed]

As far as I know, the total pressure changes across a shock wave. How is this possible if you are in the atmosphere and atmospheric pressure isn't changing? Is energy lost due to entropy in generated through a shock wave, and therefore a loss of pressure occurs?

• I answered under the assumption that you were confused about the source of the pressure change across a shock. If that is what you were asking, then try rewording the question accordingly. Dec 13, 2015 at 1:00