Hagen is located in Germany (Lower Saxony) and time zone Europe/Berlin.
Places nearby are Hasbergen, Lienen and Georgsmarienhütte.
Cologne is 162 km away, Hamburg is 219 km away and Frankfurt am Main is 236 km away as the crow flies.
Distances from Hagen to the most important cities in Germany and the world.
52.1962900°
7.9804100°
Law describing the pressure drop in an incompressible and Newtonian fluid
https://en.wikipedia.org/wiki/Hagen–Poiseuille_equation