%%visits: 2 # intuition The pressure inside a volume is equal to the pascals (force per area) on the surface of the volume. This also reminds me of A-level, when you are taught that there is a form of a plane in normal for and cartesian form, I wouldn’t be suprised if that is because of this theorem. # rigour Used in solid regions ∫∫∫∇ ⋅ vdxdydz = ∫∫v ⋅ ndσ think of link between tangents and norma # examples tags :math: