Print ViewCalculating Flux for Hemispheres of Different Radii

[dark_omen]

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.

 

[kite7]

I am probably too late but


You have E = C/r^2
You have flux = E*A

Once you find your area, you can cancel the radius out