Virtual upright and the same size
KE = 1/2 mv^2 is the relationship betwee mass and kinetic energy
The uniform microwave radiation remaining from the Big Bang.
So, your body is always having background radiation and that means space!
The force that the book exerts on the table is a normal force, not a weight force. (The book's weight doesn't act on the table, it acts on the book.) It's equal in magnitude to the weight of the book, again, because of the first law.
