If you walk from the moon (crescent) to the triangle and back to the star, what distance did you walk? (
m
-5
-4 -3
-2 -1 0 1 2 3 4 5

where are the vectors ?

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.