Aprofitant que ahir 21 de desembre era el solstici d’hivern, els alumnes de 1r de BATX dirigits pel professor Jordi Mar\u00edn van mesurar l’ombra d’un llapis a les 12 h 05′ hora solar, que \u00e9s quan el Sol estava m\u00e9s al sud geogr\u00e0fic de La R\u00e0pita.<\/p>\n
Sabent l’al\u00e7ada del llapis i la seua ombra, han pogut calcular l’angle format entre un raig de Sol que passa per la punta del llapis i el mateix llapis (el raig que projecta l’ombra). Aquest angle \u00e9s igual a la suma de la latitud del lloc on es mesura i l`’angle d’inclinaci\u00f3 de l’eix de rotaci\u00f3 de la Terra. La latitud la van prendre del Google Maps.<\/p>\n
Fets els c\u00e0lculs els alumnes van obtenir un angle de 22,6\u00ba. Com el valor real \u00e9s de 23,4\u00ba, l’error com\u00e9s en el c\u00e0lcul va ser aproximadament d’un 2%, la qual cosa \u00e9s acceptable amb els mitjans emprats.<\/p>\n
Amb aquesta activitat els alumnes van posar en pr\u00e0ctica coneixents de trigonometria amb molt d’inter\u00e8s.<\/p>\n","protected":false},"excerpt":{"rendered":"
Aprofitant que ahir 21 de desembre era el solstici d’hivern, els alumnes de 1r de BATX dirigits pel professor Jordi Mar\u00edn van mesurar l’ombra d’un llapis a les 12 h 05′ hora solar, que \u00e9s quan el Sol estava m\u00e9s al sud geogr\u00e0fic de La R\u00e0pita. Sabent l’al\u00e7ada del llapis i la seua ombra, han […]<\/p>\n","protected":false},"author":112,"featured_media":719,"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":[1,29],"tags":[],"class_list":["post-718","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","category-portada"],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/posts\/718","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/users\/112"}],"replies":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/comments?post=718"}],"version-history":[{"count":1,"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/posts\/718\/revisions"}],"predecessor-version":[{"id":720,"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/posts\/718\/revisions\/720"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/media\/719"}],"wp:attachment":[{"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/media?parent=718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/categories?post=718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agora.xtec.cat\/iesalfacs\/wp-json\/wp\/v2\/tags?post=718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}