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superfluidity
(Encyclopedia) superfluidity, tendency of liquid helium below a temperature of 2.19K to flow freely, even upward, with little apparent friction. Helium becomes a liquid when it is cooled to 4.2K.…supply and demand
(Encyclopedia) supply and demand, in classical economics, factors that are said to determine price, by correlating the amount of a given commodity producers hope to sell at a certain price (supply),…nitrogen cycle
(Encyclopedia) CE5 Nitrogen cycle nitrogen cycle, the continuous flow of nitrogen through the biosphere by the processes of nitrogen fixation, ammonification (decay), nitrification, and…conservation laws
(Encyclopedia) conservation laws, in physics, basic laws that together determine which processes can or cannot occur in nature; each law maintains that the total value of the quantity governed by…signing statement
(Encyclopedia) signing statement, written comment issued by the executive of a government when signing a bill into law. In the United States, such statements have traditionally been comparatively…Synoptic Gospels
(Encyclopedia) Synoptic GospelsSynoptic Gospelssĭnŏpˈtĭk [key] [Gr. synopsis=view together], the first three Gospels (Matthew, Mark, and Luke), considered as a unit. They bear greater similarity to…lepton
(Encyclopedia) leptonleptonlĕpˈtŏnˌ [key] [Gr.,=light (i.e., lightweight)], class of elementary particles that includes the electron and its antiparticle, the muon and its antiparticle, the tau and…executive order
(Encyclopedia) executive order, in the United States, official document initiated and signed by the president containing directives concerning how the executive branch shall carry out its…expatriation
(Encyclopedia) expatriation, loss of nationality. Such loss is usually, although not necessarily, voluntary. Generally it applies to those persons who have renounced nationality and citizenship in…elephantiasis
(Encyclopedia) elephantiasiselephantiasisĕlˈəfăntīˈəsĭs [key], abnormal enlargement of any part of the body due to obstruction of the lymphatic channels in the area (see lymphatic system), usually…Trending
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