Vacuum activities are fixed actions of
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Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… … Wikipedia
vacuum — vac|u|um1 [ˈvækjuəm, kjum] n [Date: 1500 1600; : Latin; Origin: vacuus; VACUOUS] 1.) a space that is completely empty of all gas, especially one from which all the air has been taken away 2.) a vacuum cleaner 3.) [singular] a situation in which… … Dictionary of contemporary English
Displacement activity — A displacement activity is the result of two contradicting instincts in a particular situation. Birds, for example, may peck at grass when uncertain whether to attack or flee from an opponent; similarly, a human may scratch his or her head when… … Wikipedia
Space activity suit — The Space Activity Suit developed by Paul Webb and built under a NASA project. The image shows the complete multi layer suit and positive pressure helmet, lacking only the backpack. (taken 1971) A space activity suit is a kind of spacesuit which… … Wikipedia
Extra-vehicular activity — (EVA) is work done by an astronaut away from the Earth and outside of a spacecraft. The term most commonly applies to an EVA made outside a craft orbiting Earth (a spacewalk) but also applies to an EVA made on the surface of the Moon (a moonwalk) … Wikipedia
in a vacuum — phrase existing separately, or considered separately, from other people, events, or ideas, and not influenced by them Learning cannot occur in a vacuum. Thesaurus: separate and not relatedsynonym Main entry: vacuum * * * (of an activity or a… … Useful english dictionary
Raccoon — For other species called raccoon in the genus Procyon, see Procyon (genus). For other uses, see Raccoon (disambiguation). Raccoon … Wikipedia
Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… … Universalium
cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… … Universalium
food preservation — Any method by which food is protected against spoilage by oxidation, bacteria, molds, and microorganisms. Traditional methods include dehydration, smoking, salting, controlled fermentation (including pickling), and candying; certain spices have… … Universalium
