11 résultats pour "hazard"
- HAZARD (Paul)
- le hazard
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Diving (underwater).
compensator (or control) device (BCD or BC), which the diver wears as a vest. By adding air to the BCD, the diver becomes more buoyant and rises. By releasing air,the diver becomes less buoyant and sinks. With minor adjustments of air, the diver can achieve neutral buoyancy. A third hose attaches to pressure gauges that diversuse to monitor how much air remains in the tank. A fourth hose attaches to a backup breathing device called an alternate air source, or octopus. Divers also wear a belt w...
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Littérature Francaise: Paul Hazard
Paul Hazard : est devenu un grand classique de l’histoire des idées et de la pensée dans le milieu européen, on ne peut pas se limiter à la France quand on parle de cette époque de l’histoire de l’homme, ce livre approfondi un moment très précis, le 1615, date de la mort de louis 14, le roi de France, selon P. Hasard dans l’histoire des idées (science, littérature, philosophie) il y a un état très révolutionnaire, au 18 siècle > siècle de la révolution française (1789), selon Hazard la Révo...
- Hazard Paul, 1878-1944, né à Noordpeene (Nord), écrivain et historien de la littérature français.
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Lead - chemistry.
compounds are considered serious hazards for children. Children are especially at hazard from lead, even at levels once thought safe. Lead can reduce intelligence,delay motor development, impair memory, and cause hearing problems and troubles in balance. In adults, one lead hazard at levels once thought safe is that ofincreased blood pressure. Present-day treatment of lead poisoning includes the administration of calcium disodium ethylenediaminetetraacidic acid, or EDTA, a chelatingagent; lead i...
- Expliquez, illustrez et discutez éventuellement cette afirmation de Paul Hazard (La Pensée européenne au XVIIIe siècle de Montesquieu à Lessing, 1946) : «Que la nature fût bonté, c'est ce que les philosophes crurent d'abord ; ce fut aussi ce qu'ils cessèrent de croire, après y avoir mieux réfléchi.»
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Volcano.
before eruption. Very violent explosive eruptions are called Plinian eruptions, after Roman naturalist Pliny the Elder. These eruptions can last for several hours to daysand eject a large amount of pyroclastic material. Some volcanoes can produce much more energetic eruptions that eject materials farther from the vents because oftheir andesitic and dacitic composition. Andesitic and dacitic lava is generally thicker than basaltic lava. Stiff lava generally produces more-explosive eruptions. B No...
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Flood Control.
When scientific research into the causes of floods showed that the construction of levees was insufficient as a method of control, the first steps were made to provide forreforestation and soil conservation. The Clarke-McNary Act of 1924, the Mississippi Flood Control Act of 1928, and the McSweeney-McNary Act of 1928 were all directedtoward that end. In 1935 the Soil Conservation Service was established by the Congress of the United States under an act declaring a policy of permanent provision f...
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Mount Everest - geography.
endangered or killed when their tents collapsed or were ripped to shreds by the gales. Hypothermia, the dramatic loss of body heat, is also a major and debilitatingproblem in this region of high winds and low temperatures. Another hazard facing Everest climbers is the famous Khumbu icefall, which is located not far above Base Camp and is caused by the rapid movement of the Khumbuglacier over the steep rock underneath. The movement breaks the ice into sérac (large, pointed masses of ice) cliffs...
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Hazardous Wastes.
A Source Reduction The best way to eliminate hazardous wastes is not to generate them in the first place. For example, improvements have been made in the production of integratedcircuits: The toxic chlorinated hydrocarbons commonly used in the 1970s were replaced in the 1980s by less toxic glycol ethers and in the 1990s by low-toxicity estersand alcohols. B Recycling Recycling is the recovery or reuse of usable materials from waste. About 5 percent of hazardous waste in the United States is re...