{"id":1601,"date":"2016-12-16T12:40:48","date_gmt":"2016-12-16T11:40:48","guid":{"rendered":"http:\/\/agora.xtec.cat\/ceiprellinars\/?p=1601"},"modified":"2017-01-29T20:47:05","modified_gmt":"2017-01-29T19:47:05","slug":"experiment-pressio-atmosferica","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ceiprellinars\/grans\/experiment-pressio-atmosferica\/","title":{"rendered":"EXPERIMENT PRESSI\u00d3 ATMOSFERICA"},"content":{"rendered":"<p>Teniem una pregunta: <strong>COM \u00c9S QUE A M\u00c9S ALTITUD ENS COSTA M\u00c9S RESPIRAR? NO HI HA\u00a0OXIGEN?<\/strong><\/p>\n<p>Per entendre aquesta pregunta, la N\u00faria i la Cristina ens proposen fer un experiment sobre\u00a0la pressi\u00f3 atmosf\u00e8rica ja que estem estudiant el Tint\u00edn al Tibet que es un projecte en qu\u00e8 estem\u00a0treballant\u00a0l&#8217;alpinisme.<\/p>\n<p>Vam estar parlant sobre el tema de la pressi\u00f3 atmosf\u00e8rica. \u00a0Com a m\u00e9s altitud\u00a0hi ha menys pressi\u00f3 atmosf\u00e8rica \u00a0i les mol\u00e8cules d&#8217;aire estan m\u00e9s separades. \u00c9s per aix\u00f2 que et costa m\u00e9s respirar quan est\u00e0s a una gran altitud. Per\u00f2 quan est\u00e0s a menys altitud, les mol\u00e8cules estan m\u00e9s juntes i no et costa tant respirar. Tot i aix\u00ed sabem que en els dos llocs n&#8217;hi ha la quantitat d&#8217;aire.<\/p>\n<p>Per fer l&#8217;experiment, hem necessitat diversos materials:<\/p>\n<ul>\n<li>una llauna buida<\/li>\n<li>un bol<\/li>\n<li>un fogonet<\/li>\n<li>aigua<\/li>\n<li>pinces<\/li>\n<\/ul>\n<p>Primer posem a la llauna aigua freda, despr\u00e9s posem aigua freda al bol. A continuaci\u00f3, posem la llauna al fogonet perqu\u00e8 s&#8217;escalfi l&#8217;aigua i comen\u00e7a a sortir vapor a mida que es va escalfant l&#8217;aigua i arriba als 90\u00baC. Quan l&#8217;aigua est\u00e0 calenta girem la llauna molt r\u00e0pid amb l&#8217;ajuda de les pinces i la posem boca avall al bol d&#8217;aigua freda, la llauna s&#8217;arruga al moment. A m\u00e9s, la llauna fa de ventosa i no sura cap a la superf\u00edcie.<\/p>\n<p>Gr\u00e0cies a aquest experiment sabem que la llauna s&#8217;ha arrugat perqu\u00e8 al aplicar-li calor, simulem poca pressi\u00f3 atmosf\u00e8rica, per tant, les mol\u00e8cules estan separades i al aplicar-li l&#8217;aigua freda, la pressi\u00f3 \u00e9s m\u00e9s gran, les mol\u00e8cules \u00a0estan m\u00e9s juntes i per aix\u00f2 es contrau la llauna en el moment que li tapem l&#8217;obertura. \u00c9s com si hagu\u00e9ssim baixat una ampolla d&#8217;aigua buida des d&#8217;un punt amb molta altitud a un altre on no n&#8217;hi ha gaire. L&#8217;ampolla s&#8217;hagu\u00e9s arrugat al baixar.<\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130009_opt.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-1768\" src=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130009_opt.jpg\" alt=\"OLYMPUS DIGITAL CAMERA\" width=\"400\" height=\"300\" srcset=\"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130009_opt.jpg 400w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130009_opt-300x225.jpg 300w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130009_opt-200x150.jpg 200w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130004_opt.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-1769\" src=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130004_opt.jpg\" alt=\"OLYMPUS DIGITAL CAMERA\" width=\"400\" height=\"300\" srcset=\"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130004_opt.jpg 400w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130004_opt-300x225.jpg 300w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130004_opt-200x150.jpg 200w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130001_opt.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-1770\" src=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130001_opt.jpg\" alt=\"OLYMPUS DIGITAL CAMERA\" width=\"400\" height=\"300\" srcset=\"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130001_opt.jpg 400w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130001_opt-300x225.jpg 300w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130001_opt-200x150.jpg 200w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130171_opt.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-1771\" src=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130171_opt.jpg\" alt=\"OLYMPUS DIGITAL CAMERA\" width=\"400\" height=\"300\" srcset=\"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130171_opt.jpg 400w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130171_opt-300x225.jpg 300w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130171_opt-200x150.jpg 200w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130170_opt.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-1772\" src=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130170_opt.jpg\" alt=\"OLYMPUS DIGITAL CAMERA\" width=\"400\" height=\"300\" srcset=\"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130170_opt.jpg 400w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130170_opt-300x225.jpg 300w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC130170_opt-200x150.jpg 200w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC020142_opt.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-1773\" src=\"http:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC020142_opt.jpg\" alt=\"OLYMPUS DIGITAL CAMERA\" width=\"400\" height=\"300\" srcset=\"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC020142_opt.jpg 400w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC020142_opt-300x225.jpg 300w, https:\/\/agora.xtec.cat\/ceiprellinars\/wp-content\/uploads\/usu566\/2016\/12\/PC020142_opt-200x150.jpg 200w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Teniem una pregunta: COM \u00c9S QUE A M\u00c9S ALTITUD ENS COSTA M\u00c9S RESPIRAR? NO HI HA\u00a0OXIGEN? Per entendre aquesta pregunta, la N\u00faria i la Cristina ens proposen fer un experiment sobre\u00a0la pressi\u00f3 atmosf\u00e8rica ja que estem estudiant el Tint\u00edn al Tibet que es un projecte en qu\u00e8 estem\u00a0treballant\u00a0l&#8217;alpinisme. Vam estar parlant sobre el tema de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1769,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[9],"tags":[],"class_list":["post-1601","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grans"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/1601","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/comments?post=1601"}],"version-history":[{"count":2,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/1601\/revisions"}],"predecessor-version":[{"id":1774,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/1601\/revisions\/1774"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/media\/1769"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/media?parent=1601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/categories?post=1601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/tags?post=1601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}