11. It also allows applying incompressible-flow data to compressible -flow cases. 12. Is " that " internal structure a compressible data-format? 13. Above 0.3, the problem should be solved by using compressible aerodynamics. 14. In compressible flow, however, the gas density and temperature also become variables. 15. The Prandtl Glauert transformation is a linearized approximation of compressible , inviscid potential flow. 16. In fact, thermodynamics is typical of compressible flows and degenerates in incompressible flows. 17. As gases are compressible , the compressor also reduces the volume of a gas. 18. There is a third possible manifestation based on the Bernoulli effect for compressible gases. 19. This would happen only because air is compressible . 20. The piston travels completely in compressible nitrogen gas.