In the last problem of set 9/29, you wrote and approximate
continuity equation for a small Cartesian volume element in 2D.
Show that if the size of the volume element becomes zero, the
equation becomes the conservative differential continuity equation.
5.2
Rederive the results of question 5.2 by writing integral
continuity for the region between two cylinders, respectively two
spheres, of radius and .
To: 8 10/27
and 
.