buoyancy

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buoyancy

buoyancy , upward force exerted by a fluid on any body immersed in it. Buoyant force can be explained in terms of Archimedes' principle .

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"buoyancy." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

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buoyancy

A Dictionary of Earth Sciences | 1999 | | Â© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

buoyancy Condition arising from the difference between the density of a given parcel of air or gas and that of the surrounding air. It is this that makes a hydrogen- or helium-filled balloon or airship float or rise through the atmosphere. Also, if an air parcel is warmer than its surroundings, the density difference implies an upwards directed force acting upon that parcel of air and it will rise, with positive buoyancy. When a parcel of air is colder than its surroundings the reverse condition causes it to sink, with downward (negative) buoyancy. See THERMAL.

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AILSA ALLABY and MICHAEL ALLABY. "buoyancy." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "buoyancy." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (December 21, 2009). http://www.encyclopedia.com/doc/1O13-buoyancy.html

AILSA ALLABY and MICHAEL ALLABY. "buoyancy." A Dictionary of Earth Sciences. 1999. Retrieved December 21, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-buoyancy.html

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buoyancy

A Dictionary of Ecology | 2004 | | Â© A Dictionary of Ecology 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

buoyancy The condition that arises from the difference between the density of a given parcel of air or gas and that of the surrounding air. It is this that makes a hydrogen- or helium-filled balloon or airship float or rise through the atmosphere. If an air parcel is warmer than its surroundings, the density difference implies an upwards-directed force acting upon that parcel of air and it will rise, with positive buoyancy. When a parcel of air is colder than its surroundings the reverse condition causes it to sink, with downward (negative) buoyancy. See thermal.

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MICHAEL ALLABY. "buoyancy." A Dictionary of Ecology. 2004. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "buoyancy." A Dictionary of Ecology. 2004. Encyclopedia.com. (December 21, 2009). http://www.encyclopedia.com/doc/1O14-buoyancy.html

MICHAEL ALLABY. "buoyancy." A Dictionary of Ecology. 2004. Retrieved December 21, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-buoyancy.html

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