Préfecture (capital): Cergy[?]
Sous-préfectures: Argenteuil[?], Montmorency[?] and Pontoise[?].
List of Communes of the Val-d'Oise département of France
... property is that the axis of a spinning gyroscope will resist a force applied to it and will start rotating perpendicular to the force applied. This is why spinnin ...