{"id":8264,"date":"2022-11-23T18:24:04","date_gmt":"2022-11-23T17:24:04","guid":{"rendered":"https:\/\/agora.xtec.cat\/iereccomtal\/?p=8264"},"modified":"2022-12-14T09:25:16","modified_gmt":"2022-12-14T08:25:16","slug":"la-conveccio-termica-explicada-en-un-got","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/iereccomtal\/portada\/la-conveccio-termica-explicada-en-un-got\/","title":{"rendered":"La convecci\u00f3 t\u00e8rmica explicada en un got"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Avui dimecres 23 de novembre, en el marc de la mat\u00e8ria STEAM, els alumnes de 2n d\u2019ESO han fet un experiment per estudiar com funciona la convecci\u00f3 t\u00e8rmica.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ho han fet, com ja fa temps que coneixen, seguint els passos del m\u00e8tode cient\u00edfic. A partir de l\u2019observaci\u00f3 que els cossos menys densos suren sobre els de major densitat, s\u2019han preguntat si aquest fenomen explicaria tamb\u00e9 un dels mecanismes de transfer\u00e8ncia de calor m\u00e9s importants.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">L\u2019experiment que han plantejat ha consistit a ajuntar dos gots d\u2019aigua un a sobre de l\u2019altre, un amb aigua calenta tintada de vermell i l\u2019altre amb aigua freda, transparent. En una primera part, l\u2019aigua calenta l\u2019han situat al got inferior i la freda al superior i en la segona, la distribuci\u00f3 ha estat la inversa.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Els resultats han estat molt clars i els alumnes n\u2019han gaudit molt. Quan el fluid calent ha estat al got de sota, a causa de la seva inferior densitat, el tint ha enva\u00eft r\u00e0pidament el got superior, m\u00e9s fred, cosa que la majoria de nois i noies havia predit. Quan la tintada l\u2019han situat al got superior, en canvi, la sorpresa de molts dels estudiants ha estat veure que el color vermell restava a sobre i l\u2019aigua clara a sota, dividits per una barrera invisible, ben b\u00e9 com si es tract\u00e9s d&#8217;un vaixell sobre el mar.<\/span><\/p>\n<p><a href=\"https:\/\/agora.xtec.cat\/iereccomtal\/wp-content\/uploads\/usu2139\/2022\/11\/IMG-20221123-WA0013.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-8267\" src=\"https:\/\/agora.xtec.cat\/iereccomtal\/wp-content\/uploads\/usu2139\/2022\/11\/IMG-20221123-WA0013.jpg\" alt=\"\" width=\"768\" height=\"1024\" srcset=\"https:\/\/agora.xtec.cat\/iereccomtal\/wp-content\/uploads\/usu2139\/2022\/11\/IMG-20221123-WA0013.jpg 768w, https:\/\/agora.xtec.cat\/iereccomtal\/wp-content\/uploads\/usu2139\/2022\/11\/IMG-20221123-WA0013-225x300.jpg 225w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Avui dimecres 23 de novembre, en el marc de la mat\u00e8ria STEAM, els alumnes de 2n d\u2019ESO han fet un experiment per estudiar com funciona la convecci\u00f3 t\u00e8rmica.<\/p>\n","protected":false},"author":53,"featured_media":8265,"comment_status":"open","ping_status":"closed","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":[204,29,318],"tags":[232,328,231,327],"class_list":["post-8264","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eso-2","category-portada","category-secundaria","tag-ambit-steam","tag-conveccio","tag-steam","tag-transferencia-de-calor"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/posts\/8264","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/users\/53"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/comments?post=8264"}],"version-history":[{"count":3,"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/posts\/8264\/revisions"}],"predecessor-version":[{"id":8321,"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/posts\/8264\/revisions\/8321"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/media\/8265"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/media?parent=8264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/categories?post=8264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iereccomtal\/wp-json\/wp\/v2\/tags?post=8264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}