Divergence Theorem for Non-closed or non-simple volume

[@adamodragicevic3662]

man you explain things so well

[@georgefsweeney]

Thanks for the kind words, I am glad it helped.

[@SweSausage]

Great video!
In the last step when you calculated the flux out from the disc you added to be able to use divergence theorem, how did you change the double integral of S2 with dS to a double integral of D with dA? is it because 12:07 both dS and dA are the area element?
Thank you