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A cube with side lengths of 2.0m each is situated as above in an electric field...

A cube with side lengths of 2.0m each is situated as above in an electric field that points in the positive x direction at all points, but gets larger further to the right. At x=0 (where the left edge is) the strength is E=1200N/C, whereas at x=2.0m, E=1800N/C. What is the total electric flux through this box? What charge, if any, is inside the box. ε0=8.85×10−12C2/(N m2)

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