Hi, I am given the following integral.(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

\int\limits_{}^{} {\int\limits_S^{} {\mathop F\limits^ \to } } \bullet d\mathop S\limits^ \to = \int\limits_{}^{} {\int\limits_D^{} {\mathop F\limits^ \to \bullet \mathop n\limits^ \to } } dS

[/tex]

The n vector is an outward unit normal. So does the RHS of the above represent how much 'stuff' is coming out of a surface? Or does it have something to do with what is happening on a surface? The book says that the integral is called the flux of FacrossS. In many examples, there are little arrows point out of the surface so I'm not sure what the integral is supposed to represent.

Any help would be good thanks.

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# Integral - what does it represent?

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