because they are solid lines and they do not have space to be combining. Also the magnetic can stay together but not melt to being a diffusion (not liquid)
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Beats me. But since there ARE no magnetic lines of force, don't worry about it.
No, horizontal lines are parallel to each other and parallel lines never intersect.
Lines that that intersect each other at right angles on a plane are perpendicular lines.
Perpendicular lines intersect at right angles to each other.
Lines which are parallel. All other lines on the same plane eventually intersect.