The Student VectorCalculus package is needed for calculating the divergence, but it then conflicts with any multidimensional integral set from the Calculus palette. Hence, the Student MultivariateCalculus package is installed to gain Context Panel access to the MultiInt command.
Initialize
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Tools≻Load Package: Student Vector Calculus
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Loading Student:-VectorCalculus
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Tools≻Tasks≻Browse: Calculus - Vector≻
Vector Algebra and Settings≻
Display Format for Vectors
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Press the Access Settings button and select
"Display as Column Vector"
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Display Format for Vectors
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Define the vector field F
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Enter the components of F in a free vector.
Context Panel: Evaluate and Display Inline
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Context Panel: Student Vector Calculus≻Conversions≻To Vector Field
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Context Panel: Assign to a Name≻F
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Obtain , the divergence of F, and represent it parametrically
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Common Symbols palette: Del and dot-product operators
Context Panel: Evaluate and Display Inline
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Context Panel: Assign to a Name≻
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Obtain the volume integral of the divergence of F
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Tools≻Load Package:
Student Multivariate Calculus
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Loading Student:-MultivariateCalculus
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Context Panel: Assign to a Name≻Y
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Write the name given to the divergence.
Context Panel: Evaluate and Display Inline
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Context Panel: Student Multivariate Calculus≻Integrate≻Iterated
Complete the dialogs as per the figures below.
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Context Panel: Evaluate Integral
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There are two parts to the boundary of , the lower paraboloid and the upper paraboloid . The intersection of these two bounding surfaces is a circle of radius 1 lying in the plane . For the flux through the lower paraboloid, use a task template.
Tools≻Tasks≻Browse:
Calculus - Vector≻Integration≻Flux≻3-D≻Through a Surface Defined over a Disk
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Flux through a Surface Defined over a Disk
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For the Vector Field:
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For the "open" surface , Maple uses the normal , where is a position-vector description of this paraboloid. This gives a normal that is upward, and hence inward for the closed region . Because is a closed region, the normal should be outward, and hence downward; the flux through the lower paraboloid is actually .
For the flux through the upper paraboloid can be obtained with the same task template.
Tools≻Tasks≻Browse:
Calculus - Vector≻Integration≻Flux≻3-D≻Through a Surface Defined over a Disk
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Flux through a Surface Defined over a Disk
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For the Vector Field:
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The total flux is then , the same value obtained for the volume integral of the divergence, as predicted by the Divergence theorem.