speed of air during breathing

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• Breathing gas — is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas. Other artificial gases, either pure gases or mixtures of gases, are used in breathing equipment and enclosed… …   Wikipedia

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• Hydrox (breathing gas) — Hydrox, a gas mixture of hydrogen and oxygen is used as a breathing gas in very deep diving. It allows divers to descend several hundred metres.cite journal |last=Fife |first=W. P. |title=The use of Non Explosive mixtures of hydrogen and oxygen… …   Wikipedia

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• airplane — /air playn /, n. 1. a heavier than air aircraft kept aloft by the upward thrust exerted by the passing air on its fixed wings and driven by propellers, jet propulsion, etc. 2. any similar heavier than air aircraft, as a glider or helicopter. Also …   Universalium

• speech — /speech/, n. 1. the faculty or power of speaking; oral communication; ability to express one s thoughts and emotions by speech sounds and gesture: Losing her speech made her feel isolated from humanity. 2. the act of speaking: He expresses… …   Universalium

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