[Solution Library] Determine the sources and sinks of \text Field [x, ȳ, z]=3 z-3 x^2, 3 z+2 y, 4 z If C_1 is the sphere of radius 2 centered at 4,0,0,
Question: Determine the sources and sinks of
\[\text { Field }[x, \bar{y}, z]=\left\{3 z-3 x^{2}, 3 z+2 y, 4 z\right\}\]If \(C_{1}\) is the sphere of radius 2 centered at \(\{4,0,0\}\), is the net flow of this vector field across \(C_{1}\) from outside to inside, or is it from inside to outside?
If \(\mathrm{C}_{2}\) is the sphere of radius 2 centered at \(\{-3,0,0\}\), is the net flow of this vector field across \(\mathrm{C}_{2}\) from outside to inside, or is it from inside to outside?
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