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**Calculating Flux for Hemispheres of Different Radii**

## Homework Statement

Calculating Flux for Hemispheres of Different Radii.

There are two hemispheres and I have to find the flux through the annular ring of surface 1, 2, and 3 in terms of C (a constant proportional to a charge) and two radii r_1 and r_2.

Here is a diagram of this http://img233.imageshack.us/img233/5523/hemsp1tw8.gif [Broken]

## Homework Equations

flux = |E||dA|cos(theta)

E(r)=C/r^2 r_hat

These are the equations that are given in the problem.

## The Attempt at a Solution

I really have know idea where to go with this problem. I know it just has to be the equation, but I don't know how to set it. If anyone has any strategies to solving this problem that would be great.

Thanks.

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