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.
Inertial mass is a dynamic measuring method, meaning that it can only be accomplished while the object being measured is in motion. The inertia of the object is used to quantify the amount of matter. 1  An inertial balance is used to measure inertial mass. 2  Secure the inertial balance to a table. 3  Calibrate the inertial balance by putting the container in motion counting the number of vibrations in a specified time period, for example 30 seconds.