Stud welding uses a type of flux called a ferrule, a ceramic ring which concentrates the heat generated, prevents oxidation and retains the molten metal in the weld zone. The ferrule is broken off of the fastener after the weld is completed.
Inertia is a nice and easy physics lessons for kids and children. In physics, inertia is part of Isaac Newtonâs First Law of Motion simply stating that a particular object at rest will stay in that state unless otherwise a force is put on it for the object to move.
Inertia is dependent on the mass of the object being considered, and sometimes by its momentum - depending on how we are using the term. Recall that inertia is the resistance â¦of a body to a change in motion. (A body at rest tends to remain at rest unless acted on by an outside force. And, a body in motion tends to remain in motion unless acted on by an outside force.)   We think of something massive as resistive to being moved. That's inertia.