{"id":7100,"date":"2021-03-24T10:38:57","date_gmt":"2021-03-24T09:38:57","guid":{"rendered":"http:\/\/agora.xtec.cat\/ceiprellinars\/?p=7100"},"modified":"2021-03-24T10:38:57","modified_gmt":"2021-03-24T09:38:57","slug":"el-misteri-dels-globus-que-exploten","status":"publish","type":"post","link":"https:\/\/agora.xtec.cat\/ceiprellinars\/actualitat\/el-misteri-dels-globus-que-exploten\/","title":{"rendered":"El misteri dels globus que exploten"},"content":{"rendered":"<p>Seguim amb els laboratoris de la <strong>Missi\u00f3 Alba <\/strong> on hem arribat al laboratori 3 on parlem sobre l\u2019energia, que ja hem treballat a principi de curs.<\/p>\n<p>El repte que se\u2019ns ha plantejat consistia en fer explotar globus de diferents colors sense tocar-los. Despr\u00e9s de fer les nostres hip\u00f2tesis sobre com fer explotar els globus vam comen\u00e7ar amb l\u2019experiment.<\/p>\n<p>En primer lloc hav\u00edem d\u2019enganxar els globus en un lloc fixe i tenir un dia solejat, nosaltres ho vam fer a la tanca de la pista. Cada grup tenia tres globus de diferents colors: negre, verd, blau, lila, vermell, groc, blanc, taronja, daurat, etc. Amb les mesures de seguretat necess\u00e0ries, ens vam posar les ulleres de sol per protegir la nostra vista.<\/p>\n<p>Amb la lupa, enfoquem el globus. Aquesta s\u2019havia de col\u00b7locar de forma paral\u00b7lela a la superf\u00edcie del globus i perpendicular als rajos del Sol, fins aconseguir concentrar a la superf\u00edcie del globus una petita rodona de llum. A partir d\u2019aquest moment hav\u00edem de cronometrar el temps que trigava el globus en explotar i ho vam repetir amb cadascun dels globus.<\/p>\n<p>Ens va sorprendre la rapidesa en que alguns dels globus explotaven, gaireb\u00e9 mil\u00b7l\u00e8simes de segon. Vam observar que els globus m\u00e9s foscos com el negre trigaven res en explotar mentre que els blancs els hi costava molt\u00edssim.<\/p>\n<p>Aquest fenomen passa perqu\u00e8 hi han colors, com el negre, que poden absorbir tots els rajos del Sol i s&#8217;escalfa. D&#8217;altres, com el blanc, reflecteix els rajos i no arriben a escalfar-se tant.<\/p>\n<p>Amb l&#8217;experiment dels globus i la lupa, al concentrar l&#8217;energia en un punt, han explotat abans els colors que m\u00e9s energia absorbeixen, els colors foscos i els colors m\u00e9s clars reflecteixen l&#8217;energia del Sol i han trigat m\u00e9s en explotar.<\/p>\n<p>\u00c9s per aix\u00f2 que, quan nosaltres veiem el color d&#8217;un objecte, \u00e9s perqu\u00e8 aquest objecte en primer lloc absorbeix una part dels rajos de llum que venen del Sol, la resta de rajos s\u00f3n reflectits\u00a0i ens arriben als nostres ulls, on rebem aquesta informaci\u00f3 com al color que identifica aquest objecte.<\/p>\n<p>Per exemple, una taronja absorbeix tots els rajos de colors menys el color taronja qu\u00e8 \u00e9s el que reflecteix i nosaltres s\u00ed veiem.<\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Seguim amb els laboratoris de la Missi\u00f3 Alba on hem arribat al laboratori 3 on parlem sobre l\u2019energia, que ja hem treballat a principi de curs. El repte que se\u2019ns ha plantejat consistia en fer explotar globus de diferents colors sense tocar-los. Despr\u00e9s de fer les nostres hip\u00f2tesis sobre com fer explotar els globus vam [&hellip;]<\/p>\n","protected":false},"author":23,"featured_media":7105,"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":[1,9],"tags":[],"class_list":["post-7100","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualitat","category-grans"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/7100","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\/23"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/comments?post=7100"}],"version-history":[{"count":2,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/7100\/revisions"}],"predecessor-version":[{"id":7112,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/posts\/7100\/revisions\/7112"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/media\/7105"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/media?parent=7100"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/categories?post=7100"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/ceiprellinars\/wp-json\/wp\/v2\/tags?post=7100"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}