{"id":4456,"date":"2018-11-03T00:23:18","date_gmt":"2018-11-02T23:23:18","guid":{"rendered":"http:\/\/agora.xtec.cat\/iesperefontdevila\/?p=4456"},"modified":"2025-07-27T09:22:16","modified_gmt":"2025-07-27T07:22:16","slug":"rocket-man","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/iesperefontdevila\/portada\/rocket-man\/","title":{"rendered":"Rocket Man"},"content":{"rendered":"<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/4-atFPk3wiQ\" width=\"560\" height=\"314\" allowfullscreen=\"allowfullscreen\"><\/iframe><br \/>\nEls alumnes de f\u00edsica de 1r de batxillerat han estudiat i analitzat els par\u00e0metres cinem\u00e0tics del vol d&#8217;un coet durant totes les seves fases. Des de l&#8217;enlairament fins a l&#8217;aterratge, passant pel punt de m\u00e0xima al\u00e7ada. La f\u00edsica te\u00f2rica est\u00e0 molt b\u00e9, per\u00f2 tamb\u00e9 han volgut posar a prova els seus nous coneixements i han decidit que volien llan\u00e7ar un coet real. El v\u00eddeo mostra aquesta part experimental.<br \/>\nEls coets utilitzen vinagre i bicarbonat de sodi com a reactius. Quan entra en contacte l&#8217;\u00e0cid ac\u00e8tic del vinagre amb el bicarbonat de sodi es produeix una reacci\u00f3 qu\u00edmica que produeix, entre d&#8217;altres, aigua i di\u00f2xid de carboni en estat gas\u00f3s. Aquesta generaci\u00f3 de di\u00f2xid de carboni dins una ampolla tancada fa que augmenti la pressi\u00f3 dins l&#8217;ampolla. Quan la pressi\u00f3 \u00e9s molt alta el tap no pot suportar la difer\u00e8ncia de pressi\u00f3 i allibera bruscament el contingut de l&#8217;ampolla. L&#8217;aigua produ\u00efda en la reacci\u00f3 \u00e9s alliberada a molta velocitat cap avall de manera que per la 3a llei de Newton el coet puja a molta velocitat cap amunt. Et voil\u00e0!<\/p>\n","protected":false},"excerpt":{"rendered":"<p><iframe loading=\"lazy\" src=\"\/\/www.youtube.com\/embed\/4-atFPk3wiQ?showinfo=0\" width=\"224\" height=\"126\"><\/iframe><\/p>\n","protected":false},"author":1,"featured_media":0,"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":"default","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":"set","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":[29,130,68,230],"tags":[],"class_list":["post-4456","post","type-post","status-publish","format-standard","hentry","category-portada","category-1bat","category-ciencies-experimentals","category-promocio_2014-20"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/posts\/4456","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/comments?post=4456"}],"version-history":[{"count":2,"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/posts\/4456\/revisions"}],"predecessor-version":[{"id":11075,"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/posts\/4456\/revisions\/11075"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/media?parent=4456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/categories?post=4456"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesperefontdevila\/wp-json\/wp\/v2\/tags?post=4456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}