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.
Inertia will continue until someone picks up one of these balls. Inertia will continue until someone picks up one of these balls. The definition of inertia is when an object remains still or moves in a constant direction at a constant speed. 1  Inertia will continue unless the object meets some external force.