{"id":7924,"date":"2021-03-10T16:07:41","date_gmt":"2021-03-10T15:07:41","guid":{"rendered":"https:\/\/www.atollplongee.com\/glossary\/archimede-poussee\/"},"modified":"2021-03-10T16:07:41","modified_gmt":"2021-03-10T15:07:41","slug":"archimede-poussee","status":"publish","type":"glossary","link":"https:\/\/www.atollplongee.com\/en\/glossary\/archimede-poussee\/","title":{"rendered":"Archim\u00e8de (pouss\u00e9e)<span class=\"dashicons\" data-icon=\"\" style=\"display:inline;vertical-align:baseline;\"><\/span>"},"content":{"rendered":"<p>&ldquo;La pouss&eacute;e d&rsquo;Archim&egrave;de est une loi physique qui d&eacute;crit la force dirig&eacute;e vers le haut (la pouss&eacute;e verticale) que subit tout corps plong&eacute; dans un fluide (un liquide ou un gaz), pour peu que ce corps soit soumis &agrave; la force de la gravit&eacute; (qui l&rsquo;attire quant &agrave; elle vers le bas).<br>\nC&rsquo;est en effet le principe d&rsquo;Archim&egrave;de qui explique que le poids apparent d&rsquo;un corps plong&eacute; dans l&rsquo;eau soit inf&eacute;rieur au poids r&eacute;el (qui est le poids de ce corps soumis &agrave; la <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Pression&lt;span class=&amp;quot;dashicons &amp;quot; data-icon=&amp;quot;&amp;quot; style=&amp;quot;display:inline;vertical-align:baseline;&amp;quot;&gt;&lt;\/span&gt;&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&amp;quot;La pression est une grandeur physique qui se d&eacute;finit comme &eacute;tant l&amp;#039;intensit&eacute; de la force qu&amp;#039;exerce un gaz par unit&eacute; de surface. En plong&eacute;e sous-marine, elle permet d&amp;#039;&eacute;valuer la quantit&eacute; de gaz contenu dans un volume donn&eacute;. Elle se mesure en pascals dans le syst&egrave;me international (symbole Pa), mais se mesure plut&ocirc;t en bars en plong&eacute;e :  1bar=100000Pa=1kg\/cm2  En plong&eacute;e, on distingue plusieurs types de pression : &bull;\tLa pression absolue (ou pression ambiante, ou pression environnante),&bull;\tLa pression hydrostatique,&bull;\tla haute pression, la pression interm&eacute;diaire et la basse pression,&bull;\tLa mi-pression,&bull;\tLa notion de pression partielle&amp;quot;&lt;\/div&gt;\"  href=\"https:\/\/www.atollplongee.com\/en\/glossary\/pression\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>pression<\/a> exerc&eacute;e sur lui par la plan&egrave;te Terre). En fait, ce principe a permis de th&eacute;oriser la notion de masse volumique.&rdquo;<\/p>","protected":false},"excerpt":{"rendered":"<p>&#8220;La pouss\u00e9e d&#8217;Archim\u00e8de est une loi physique qui d\u00e9crit la force dirig\u00e9e vers le haut (la pouss\u00e9e verticale) que subit tout corps plong\u00e9 dans un fluide (un liquide ou un gaz), pour peu que ce corps soit soumis \u00e0 la force de la gravit\u00e9 (qui l&#8217;attire quant \u00e0 elle vers le bas). C&#8217;est en effet [&hellip;]<\/p>","protected":false},"author":13,"featured_media":0,"menu_order":0,"template":"","meta":[],"glossary-categories":[],"glossary-tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Archim\u00e8de (pouss\u00e9e) - Atoll Plong\u00e9e Marseille<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.atollplongee.com\/en\/glossary\/archimede-poussee\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Archim\u00e8de (pouss\u00e9e) - Atoll Plong\u00e9e Marseille\" \/>\n<meta property=\"og:description\" content=\"&#8220;La pouss\u00e9e d&#8217;Archim\u00e8de est une loi physique qui d\u00e9crit la force dirig\u00e9e vers le haut (la pouss\u00e9e verticale) que subit tout corps plong\u00e9 dans un fluide (un liquide ou un gaz), pour peu que ce corps soit soumis \u00e0 la force de la gravit\u00e9 (qui l&#8217;attire quant \u00e0 elle vers le bas). 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