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This is a great deal of fluid to move, particularly as liquids are more viscous and denser than gases, (for example water is about 850 times the density of air [52]). Any increase in the diver's metabolic activity also increases CO 2 production and the breathing rate, which is already at the limits of realistic flow rates in liquid breathing.
Any body wholly or partially immersed in a fluid experiences an upward force equal to the weight of the fluid displaced. In addition to the principle that bears his name, Archimedes discovered that a submerged object displaces a volume of water equal to the object's own volume (upon which the story of him shouting "Eureka" is based). This ...
Buoyancy (/ ˈ b ɔɪ ən s i, ˈ b uː j ən s i /), [1] [2] or upthrust is a net upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus, the pressure at the bottom of a column of fluid is greater ...
If the brain used more oxygen than is available in the blood supply, the cerebral oxygen partial pressure may drop below the level required to sustain consciousness. This type of blackout is likely to occur early in the dive. [27] [29] Ascent-induced hypoxia is caused by a drop in oxygen partial pressure as ambient pressure is reduced on ascent ...
Archimedes' principle (also spelled Archimedes's principle) states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces. [1] Archimedes' principle is a law of physics fundamental to fluid mechanics. It was formulated by Archimedes of ...
In the cells of a typical tissue, the partial pressure of oxygen will drop to around 13 mbar (10 mmHg), while the partial pressure of carbon dioxide will be about 65 mbar (49 mmHg). The sum of these partial pressures (water, oxygen, carbon dioxide and nitrogen) comes to roughly 900 mbar (675 mmHg), which is some 113 mbar (85 mmHg) less than the ...
Osmoregulation is the active regulation of the osmotic pressure of an organism's body fluids, detected by osmoreceptors, to maintain the homeostasis of the organism's water content; that is, it maintains the fluid balance and the concentration of electrolytes (salts in solution which in this case is represented by body fluid) to keep the body fluids from becoming too diluted or concentrated.
Oxygen analyser – Instrument to measure partial pressure of oxygen in a gas mixture; Oxugen cell – Electro-galvanic fuel cell used for measuring oxygen concentration; Oxygen cleaning – Removal of contaminants that might cause a fire hazard in an oxygen rich environment; Oxygen compatibility – Usability in high-oxygen environments