It is the edge or line where the attributes defining the place become something else.
A convergent boundary.
A convergent boundary is the place where two plates come together.Convergent boundary
A boundary marker, such as a fence, wall, or border sign, can indicate where a place ends.
divergent boundary
Yes, a boundary layer can take place for ideal fluids. A boundary layer is the separation that is associated with strong flow deceleration or strong adverse pressure gradients.
No it is not because the border is still in place
latitude
Arkosic sandstone and shale are some of the types of rock found near the boundary of a tectonic place.
When states on either side of the boundary disagree on the policies to be put in place regarding that border.
convergent boundary
divergent boundary
i have no clue!