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.
The definition of inert is slow or having no action or power to move. An example of inert is a slug that is standing still. having inertia; without power to move, act, or resist. tending to be physically or mentally inactive; dull; slow.
Part of the Computing fundamentals glossary: Inertia is a property of matter that causes it to resist changes in velocity (speed and/or direction). According to Newton's first law of motion, an object with a given velocity maintains that velocity unless acted on by an external force. Inertia is the property of matter that makes this law hold true. The amount of inertia that an object possesses is proportional to its mass. However, inertia is not the same thing as mass or momentum (the product of velocity and mass). The mass of an object can be measured by observing the extent of its inertia.