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The second term represents an expansion of the fluid away from the \ ", StyleBox["y", FontSlant->"Italic"], " axis. If ", StyleBox["a", FontSlant->"Italic"], " > 0, the velocity vectors in the third term all point away from the \ origin. This makes the third term a fluid source; that is, it puts fluid \ into the system at the origin. If ", StyleBox["a", FontSlant->"Italic"], " < 0, the third term is a fluid sink, drawing fluid out the system at the \ origin. The magnitude of the coefficient, ", StyleBox["a", FontSlant->"Italic"], ", determines the strength of the source or sink." }], "Text"], Cell[TextData[{ "Let ", StyleBox["D", FontSlant->"Italic"], " be the region consisting of the interior of a cylinder with a hemisphere \ on the top. The cylinder is ", Cell[BoxData[ \(TraditionalForm\`x\^2 + y\^2 = 9, \ \(-6\) \[LessEqual] z \[LessEqual] 0, \)]], " and the hemisphere is ", Cell[BoxData[ \(TraditionalForm\`x\^2 + y\^2 + z\^2 = 9, \ z\ > \ 0\)]], ". Your assignment is to use ", StyleBox["Mathematica", FontSlant->"Italic"], " to find a value of ", StyleBox["a", FontSlant->"Italic"], " so that the the net mass flow of fluid across the boundaries of the \ region, ", StyleBox["S", FontSlant->"Italic"], ", is zero. Note that the boundary of ", StyleBox["S", FontSlant->"Italic"], " includes the end of the cylinder. Assume that the fluid density is \ constant." }], "Text"] }, Open ]] }, Open ]] }, FrontEndVersion->"5.2 for Microsoft Windows", ScreenRectangle->{{0, 1280}, {0, 951}}, WindowSize->{1097, 924}, WindowMargins->{{4, Automatic}, {Automatic, 0}}, PrintingCopies->1, PrintingPageRange->{1, Automatic} ] (******************************************************************* Cached data follows. If you edit this Notebook file directly, not using Mathematica, you must remove the line containing CacheID at the top of the file. 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