It was this work with Friedmann which turned Pelageia Polubarinova's interests towards hydrodynamics and this would be the focus of much of the work she undertook throughout her life.
Ito ay gumagana ito sa Friedmann na yari sa Pelageia Polubarinova ng interes sa haydrodinamika at ito ay magiging ang focus ng marami ng trabaho siya undertook sa lahat ng dako ng kanyang buhay.