In simple words, an Oxygen Concentrator works on electricity; takes in room air, removes Nitrogen from it and provides upto 95% pure Oxygen. The composition of air (78% Nitrogen, 21% Oxygen and 1% other gases like Carbon Dioxide, Argon, etc.) clearly shows that air is mainly comprised of two gases: Nitrogen and Oxygen [together 99%].
Word Origin and History for savoir-faire Expand. n. instinctive knowledge of the right course of action in any circumstance, 1815, from French, literally to know (how) to do, from savoir to know (from Latin sapere; see sapient) + faire (from Latin facere; see factitious).
Simply stated, itâs jury selection. Or, at least, thatâs what it usually means. Most Common Usage: Ordinarily, the term âvoir direâ refers to the process of selecting a jury from a panel of prospective jurors (sometimes referred to as veniremen). In this context, the purpose of voir dire is to ask jurors questions, which they are sworn to answer truthfully, for the purpose of selecting a fair and impartial jury to hear a case.