Yes it is :) It's just like any other form of gum, but for a different use.
That varies, between one airline and another - or, within the same airline, between one year and another.
ride in a plane. you would fly a plane
No. A square is a plane figure and conventionally for plane figures symmetry is considered in terms of rotation about a point or an axis (in the plane of the figure) but not a plane outside the plane of the square.
The slope of an inclined plane is found by dividing the rise of the plane by the run of the plane. also the ideal mechanical advantage.
Yes, allowed.
No
No
Yes, they are on any plane.
Yes
No.
No.
Yes, unless the airline says something about it, you are allowed to take an mp3 player on a plane.
NO! Absolutely not! If it's not allowed in the plane why would it be allowed in the bathroom?
yes
A bomb
Both yes and no