De or het aeromechanica?

The correct Dutch article is:

de aeromechanica

Rule Words ending in -ica: usually de. See the rule
Meaning (Dutch) (natuurkunde) mechanica van gassen

How to use aeromechanica

the aeromechanicade aeromechanica
this aeromechanicadeze aeromechanica
that aeromechanicadie aeromechanica
our aeromechanicaonze aeromechanica
your aeromechanicajouw aeromechanica
every aeromechanicaelke aeromechanica
which aeromechanica?welke aeromechanica?
a big aeromechanica / the big aeromechanicaeen grote aeromechanica, de grote aeromechanica

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).