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## Homework Statement

Can someone explain the following to me,

[tex]\nabla x \vec{V} = -k \frac{\partial{\Phi}}{\partial{t}} \hat{a}_n[/tex]

where [tex]\vec{V}, \Phi[/tex] are the wind velocity and pressure respectively.

## Homework Equations

Take the cross product- thus in the matrix we have the unit vectors in the first row, the partial derivatives on the second row, and the Force (relative to each unit) on the third row.

## The Attempt at a Solution

I am not sure, it was just a definition I saw in my notes. Could someone explain the purpose of [tex]-k, \partial{\Phi}[/tex]. I know [tex]a_n[/tex] is the unit normal.

thanks,

JL

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