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 P: 6 so what you are saying (in regards to question no. 1) is that when i get E=0, it's because im adding vectors for which the total sum is zero (opposite directions) while the flux does not "consider" that case, and is a "per case" thing - each face has it's own flux, even though total E is zero? and another one: how can i find the field exerted by infinite plane on a point along the Z axis, but without using Gauss law? do i just say that a dq part of the charge is equal to kσdxdy and then $\overline{E}$=$\int\int kσdxdy\cdot\frac{z}{\sqrt{x^{2}+y^{2}}}$ ? thank you!