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Algebraic!
 2 years ago
Best ResponseYou've already chosen the best response.0what are r and sigma representing.

Carl_Pham
 2 years ago
Best ResponseYou've already chosen the best response.0r is probably the vector from the origin to any point on the surface, and sigma is probably the unit vector normal to the surface at that point.

gerryliyana
 2 years ago
Best ResponseYou've already chosen the best response.0@CliffSedge can you help me please

CliffSedge
 2 years ago
Best ResponseYou've already chosen the best response.0Been too long since I've done integrals like these. I'll have to refresh my memory first.

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1350687107096:dw

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1350687145672:dw

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.0So when it says that \[ \vec{r}\cdot d\vec{\sigma}=0 \] for three of the surfaces, can you see which three this pertains to and why?

Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.0when, in general, is a dot product zero?
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