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Oceanus
Oceanus , in Greek mythology. 1 Circular stream that flows around the edge of the earth. The sun and moon rise from and descend into this stream; it is the source of all rivers. 2 Personification of the circular stream described above. He was the Titan son of Uranus and Gaea, the husband of Teth...
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Nenagh
Nenagh , town (1991 pop. 5,825), Co. Tipperary, S central Republic of Ireland. It is an agricultural market with varied manufactures. Nenagh Castle (c.1200) has a circular keep. Nearby are ruins of a Franciscan friary, founded in the 13th cent. and destroyed by Oliver Cromwell 's forces in 1650.
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rath
rath , circular hill fort protected by earthworks, used by the ancient Irish in the pre-Christian era as a retreat in time of danger. Some of the larger raths, such as that at Tara , were important in early Irish history and were used by chieftains or kings. Many raths remain throughout Ireland.
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astrobleme
astrobleme , large, circular structure ranging from c. 1/2 mi to 40 mi (.8-64 km) in diameter. Astroblemes are found at numerous places on the earth's surface, e.g., Meteor, or Barringer, Crater in Arizona, Brent Crater in Ontario, and Vredefort Ring in South Africa. The presence of meteor fragme...
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centripetal force and centrifugal force
centripetal force and centrifugal force action-reaction force pair associated with circular motion . According to Newton's first law of motion, a moving body travels along a straight path with constant speed (i.e., has constant velocity ) unless it is acted on by an outside force . For circular ...
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advertising
advertising in general, any openly sponsored offering of goods, services, or ideas through any medium of public communication. At its inception advertising was merely an announcement; for example, entrepreneurs in ancient Egypt used criers to announce ship and cargo arrivals. The invention of print...
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Ectoprocta
Ectoprocta , phylum of sessile, colonial aquatic animals (commonly known as moss animals or oryonzoans). The zooids, or individual members of a colony, are microscopic, but colonies may grow up to 1 ft (30 cm) or more in diameter. Some colonies are erect and branching; others are thin, flat encrusta...
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optical activity
optical activity the ability of asymmetric compounds to rotate the orientation of planar polarized light. Such compounds and their mirror images are know as enantiomers, or optical isomers. Although differing in geometric arrangement, enantiomers possess identical chemical and physical properties. ...
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pendentive
pendentive in architecture, a constructive device permitting the placing of a circular dome over a square room or an elliptical dome over a rectangular room. The pendentives, which are triangular segments of a sphere, taper to points at the bottom and spread at the top to establish the continuous c...
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Formulas for the Volumes of Some Common Solids
Formulas for the Volumes of Some Common Solids
Formulas for the Volumes of Some Common Solids
Solid
Volume
Abbreviations: B = area of base; h = height; r = radius; l = length; w =&thin...
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