Final answer:
The net electric flux through a square surface in the yz-plane due to two symmetrically placed charges on the x-axis is zero. Two-point perspective in drawing refers to a cube having two vanishing points. The cubic and hexagonal relationship in crystalline structures is due to the orientation of the FCC stack.
Step-by-step explanation:
The question appears to be related to the concept of electric flux in physics, specifically focusing on the net flux through a surface due to charge distribution. When considering two equal and opposite charges located symmetrically on the x-axis, and a square surface situated in the yz-plane, the net electric flux is calculated by using the principle of superposition.
Due to symmetry, the flux by each charge will be the same in magnitude but opposite in direction, resulting in a net flux of zero through the square surface in the yz-plane.
It's important to note that the electric field lines emanating from one charge will enter or exit the square surface, and the same number of field lines from the other charge will enter or exit the surface in the opposite direction, effectively cancelling each other out.
Similarly, in the context of a two-point perspective in drawing, the term refers to a type of linear perspective, where a cube has two vanishing points on the horizon line. Perspective drawing is an essential technique for creating a three-dimensional look on a two-dimensional surface.
In the context of cubic structures, the fact that B-layer atoms form a hexagon within a cubic structure is explained by the orientation of the FCC stack relative to the cube's faces. This understanding helps clarify the geometric relationship within crystalline structures.