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A pier is a raised structure, including bridge and building supports and walkways, typically supported by widely spread piles or pillars. The lighter structure of a pier allows tides and currents to f ...
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A vassal or feudatory is a person who has entered into a mutual obligation to a lord or monarch in the context of the feudal system in medieval Europe. The obligations often included military support ...
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Observation is the active acquisition of information from a primary source. In living beings, observation employs the senses. In science, observation can also involve the recording of data via the us ...
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Saponification is a process that produces soap, usually from fats and lye.
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France is a country in Western Europe. France borders the Atlantic Ocean and the Mediterranean. To the west is the Bay of Biscay, to the north is the English Channel and the North Sea. France also has ...
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In physical cosmology, cosmic inflation, cosmological inflation, or just inflation is the exponential expansion of space in the early universe. The inflationary epoch lasted from 10−36 seconds after t ...
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In engineering, deflection is the degree to which a structural element is displaced under a load. It may refer to an angle or a distance.The deflection distance of a member under a load is directly re ...
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A ropeway is a form of naval lifting device used to transport light stores and equipment across rivers or ravines. It comprises a jackstay, slung between two sheers or gyns, one at either end, from w ...
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A solar calendar is a calendar whose dates indicate the position of Earth on its revolution around the Sun or, equivalently, the apparent position of the sun moving on the celestial sphere.
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A lunar calendar is a calendar that is based on cycles of the lunar phases. Because there are slightly more than twelve lunations (synodic months) in a solar year, the period of 12 lunar months (354.3 ...
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