Mass continuity equation's applications for fluid

[Tosh5457]

Hi, I have a project where I have to speak about some applications of the mass continuity equation for fluids. I only found this http://www.efm.leeds.ac.uk/CIVE/CIVE1400/Section3/continuity.htm, but that's not enough. What else do you think I can speak about?

 

[Pythagorean]

My classical mechanics teacher used it as a chance to talk about the physical meaning of integral form vs. derivative form. And also the physical meaning of a partial derivative vs. a total derivative.