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.
Capacitors and inductors give a different type of resistance, called a reactance. Reactances are frequency-dependent, that is, you need to know the frequency of the AC waveform to solve for these reactances. A capacitor has a capacitive reactance, while an inductor has an inductive reactance.