By doing so, weld current and force is focused into the small area of the projection, and heat is obtained from the resistance to the flow of the welding current. Due to this heat, the projections collapse and the parts are weld together. Another successful welding technique is capacitor discharge stud welding, which uses weld studs or specially formed bolts for welding instead of projections.
Definition of inert. 1  1 : lacking the power to move. 2  2 : very slow to move or act : sluggish. 3  3 : deficient in active properties; especially : lacking a usual or anticipated chemical or biological action.
Meaning: (physics) the tendency of a body to maintain is state of rest or uniform motion unless acted upon by an external force. Classified under: Nouns denoting natural phenomena. Hypernyms (inertia is a kind of...): mechanical phenomenon (a physical phenomenon associated with the equilibrium or motion of objects).