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## Homework Statement

A charge of 2.1 µC is 20 cm above the center of a square of side length 40 cm. The permittivity of free space is 8.85*10^-12 C^2/N*m^2. Find the flux through the square. Answer in units of N*m^2/C.

## Homework Equations

## The Attempt at a Solution

I really need some help with starting this problem... =(