MIG welding is an arc welding process in which a continuous solid wire electrode is fed through a welding gun and into the weld pool, joining the two base materials together. A shielding gas is also sent through the welding gun and protects the weld pool from contamination. In fact, MIG stands for metal inert gas.

A scalar quantity is defined as the physical quantity that has only magnitude, for example, mass, energy and electric charge.

On the other hand, a vector quantity is defined as the physical quantity that has both magnitude as well as direction like force, weight, acceleration, momentum and velocity.