Swelling. Swelling (edema) is a build-up of water in the tissues. This can be caused by retaining salt and water due to medicines or heart, liver, or kidney failure. It can sometimes be due to poor nutrition, pelvic tumors, or a blockage in the veins or lymph system.
Reactance, denoted X, is a form of opposition that electronic components exhibit to the passage of alternating current (alternating current) because of capacitance or inductance. In some respects, reactance is like an AC counterpart of DC (direct current) resistance.
Reactivity of a gas is a classification as to whether or not it will chemically react with the molten weld puddle. Gases can be divided into two groups, inert and active. Inert gases, or noble gases, are those that are unreactive with other elements in the weld puddle. Argon is an inert gas.