In 2d vector fields, we learn how to do two types of integrals: flow integrals and flux integral over a curve. My question is, why can we do flux integrals in 3D over a surface, but not flow integrals ? We can do a flow integral over a line in 3D, but why not over a surface ?
2026-04-02 17:42:51.1775151771
Why can we do a flux integral over a surface but not a flow integral
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