De or het hydromechanica?

The correct Dutch article is:

de hydromechanica

Rule Words ending in -ica: usually de. See the rule
Meaning (Dutch) (natuurkunde) mechanica van vloeistoffen, omvattende de hydrostatica en de hydrodynamica

How to use hydromechanica

the hydromechanicade hydromechanica
this hydromechanicadeze hydromechanica
that hydromechanicadie hydromechanica
our hydromechanicaonze hydromechanica
your hydromechanicajouw hydromechanica
every hydromechanicaelke hydromechanica
which hydromechanica?welke hydromechanica?
a big hydromechanica / the big hydromechanicaeen grote hydromechanica, de grote hydromechanica

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