🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiPortuguêsTürkçeРусский한국어中文日本語EntityQ1424492· pop 15· linked from 21 articlesPrandtl–Glauert singularitythe point at which a sudden drop in air pressure occursConnectionsspeed of soundEntityMach numberEntityCategoriesAerodynamicsObsolete theories in physicsPhysical phenomenaShock waves