The atomic mass is important because? a. it tells you the size of the atom b. it tells you the charge of the atom c. it tells you the number of electrons

Determine the moment of the force f about an axis extending between a and c. express the result as a cartesian vector. a is at the origin, c is at (4,3,0) and f = (4i + 12j -3k) lb coming out of b (4,3,-2).