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  1. Standard atmosphere (unit) - Wikipedia

    From Wikipedia, the free encyclopedia (Redirected from Atmosphere (unit)) The standard atmosphere (symbol: atm) is a unit of pressure defined as 101 325 Pa (1.013 25 bar). It is sometimes used as a reference or standard pressure.

    • 101.325 kPa
    • 14.69595 psi
  2. Atmosphere - Wikipedia

    An atmosphere (from Ancient Greek ἀτμός (atmos), meaning 'vapour', and σφαῖρα (sphaira), meaning 'ball' or 'sphere') is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.

  3. Atmosphere (unit) - Simple English Wikipedia, the free ...

    From Simple English Wikipedia, the free encyclopedia The standard atmosphere (symbol: atm) is a unit of pressure that refers to the air pressure at sea level. It is defined as equal to 101325 Pa. Since 1982, it has been replaced by the bar, which is equal to exactly 10 5 Pa.

  4. Atmosphere of Earth - Wikipedia

    The atmosphere of Earth is the layer of gases, commonly known as air, retained by Earth's gravity, surrounding the planet Earth and forming its planetary atmosphere.The atmosphere of Earth protects life on Earth by creating pressure allowing for liquid water to exist on the Earth's surface, absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect ...

  5. Atmosphere (unit) From Wikipedia, the free encyclopedia The stan­dard atmosphere (sym­bol: atm) is a unit of pres­sure de­fined as 101325 Pa (1.01325 bar). It is some­times used as a ref­er­ence or stan­dard pressure.

  6. Talk:Standard atmosphere (unit) - Wikipedia

    The atmosphere unit is based on the pressure at Earth's "surface" under certain conditions. Any pressure is also the same as the pressure exerted by some height of water, whether that height is 1 mm or 1 km or anything else.

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  8. Atmospheric pressure - Wikipedia

    The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa; 1,013.25 mbar), which is equivalent to 760 mm Hg, 29.9212 inches Hg, or 14.696 psi. The atm unit is roughly equivalent to the mean sea-level atmospheric pressure on Earth, that is, the Earth's atmospheric pressure at sea level is approximately 1 atm.

  9. atmosphere - Wiktionary
    • Etymology
    • Pronunciation
    • Noun

    From French atmosphère, from New Latin atmosphaera, from Ancient Greek ἀτμός (atmós, “steam”) + Ancient Greek σφαῖρα (sphaîra, “sphere”); corresponding to atmo- +‎ -spher-

    (UK) IPA(key): /ˈæt.məsˌfɪə(ɹ)/
    (US) IPA(key): /ˈætməsˌfɪɹ/

    atmosphere (plural atmospheres) 1. The gases surrounding the Earth or any astronomical body. 1.1. Coordinate terms: hydrosphere, biosphere 1.2. Meronyms: see Thesaurus:atmosphere 2. The air in a particular place. 2.1. 1913, Mrs. [Marie] Belloc Lowndes, chapter I, in The Lodger, London: Methuen, OCLC 7780546; republished in Novels of Mystery: The Lodger; The Story of Ivy; What Really Happened, New York, N.Y.: Longmans, Green and Co.,[…], [1933], OCLC 2666860, page 0016: 2.1.1. Thus the red damask curtains which now shut out the fog-laden, drizzling atmosphere of the Marylebone Road, had cost a mere song, and yet they might have been warranted to last another thirty years. A great bargain also had been the excellent Axminster carpet which covered the floor;[…]. 3. (figuratively) The apparent mood felt in an environment. 3.1. Synonyms: air, ambiance, feeling, mood 4. A unit of measurement for pressure equal to 101325 Pa (symbol: atm)

  10. Bar (unit) - Wikipedia

    The bar is a metric unit of pressure, but not part of the International System of Units (SI). It is defined as exactly equal to 100,000 Pa (100 kPa), or slightly less than the current average pressure at sea level (approximately 1.013 bar).

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