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        riddles >> putnam exam (pure math) >> Flux of A Vector Field
        
(Message started by: Whiskey Tango Foxtrot on Dec 5^th, 2006, 7:29pm)

Title: Flux of A Vector Field
Post by Whiskey Tango Foxtrot on Dec 5^th, 2006, 7:29pm

What is the flux of the vector field r/r³ through the surface (x-1)² + y² + z² = 2

Title: Re: Flux of A Vector Field
Post by Eigenray on Dec 6^th, 2006, 6:20am

Just 4[pi], by Gauss's law / Stokes's theorem.

Title: Re: Flux of A Vector Field
Post by Whiskey Tango Foxtrot on Dec 6^th, 2006, 8:54am

Yep. Many people forget about Gauss and Stokes for problems like this. ;)

Title: Re: Flux of A Vector Field
Post by Sameer on Dec 6^th, 2006, 10:42am

You talking about forgetting Gauss/Stoke? I can't remember how to even start this vector calculus problem.. there was a time when I loved this subjet (actually I still do; just don't remember it)... I haven't used it since I came out of school... which is why I come here :D now i have an excuse to open up my math text book refresh the subject and post a solution.. even tho Eigenray already gave the answer...