that's the "normal force"
This usually refers to a light ray that hits a surface at 90 degrees, or perpendicular. In physical science the word "normal" is often used to mean perpendicular.
For a structure (usually a tower) that is perpendicular to the ground, if the center of gravity were to go a distance over its base, it will fall over. Can be seen in the leaning tower of piza. The reason it has not fallen over is because its center of gravity has not exceeded the length of its base.
In Physics, "normal" force means force that's perpendicular to something, usually to a surface.In that usage, 'normal' does not mean ordinary, typical, usual, familiar, etc.
Pressure is the force per unit area applied in a direction perpendicular to the surface of an object usually denoted by the symbol p.
That's the force we usually call the "weight" of the person or object.
Specific gravity is the ratio of a substance's density to that of a standard, usually water. Gravity is a force of attraction between two bodies. We usually think of the gravitational force of the earth as the force of attraction for bodies on the surface of the earth, but all objects exert a tiny attraction for each other.
Usually none, but all ten can be perpendicular.
neither, a regular hexagon's sides hit at a 120 degree angle so they are neither parallel nor perpendicular. An irregular hexagon's can, but usually don't. In a regular hexagon (all 6 sides congruent), opposite sides are parallel.
No, not usually.
Usually not, but it can.
Not usually.
Not usually.