일반물리학 2 — Gauss' Law: Problem 23

23 Figure 23-34 shows a closed Gaussian surface in the shape of a cube of edge length 2.00 m, with one corner at $x_1 = 5.00$ m, $y_1 = 4.00$ m. The cube lies in a region where the electric field vector is given by $\vec{E} = [23.0\hat{i} - 2.00y^2\hat{j} - 16.0\hat{k}]$ N/C, with $y$ in meters. What is the net charge contained by the cube?