Please help! I'm soo confused with surface integrals and have several to do by tues for my tutorial. I don't really understand how to approach surface integrals! Could someone give me an over-view and help me through the question below - hopefully then I can manage the rest myself (Btw $ = integral sign)(adsbygoogle = window.adsbygoogle || []).push({});

Q. Ifnis the unit normal to the surface S, evaluate $$r.ndS over:

a) the unit cube bounded by the coordinate planes and the the planes x=1, y=1 & z=1;

b) the surface of a sphere of radius a centred on the origin.

I *think* that I have to start by finding an equation for the cube (how?!) and then using divergence theorem but I really have no idea what I'm doing (I couldn't follow the lectures and books confuse me with their notation! :uhh:

Thanks

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# Surface Integrals & Vectors

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