{"id":523,"date":"2019-12-17T09:14:30","date_gmt":"2019-12-17T07:14:30","guid":{"rendered":"https:\/\/blog.edu.turku.fi\/scienceed\/?p=523"},"modified":"2019-12-17T09:14:49","modified_gmt":"2019-12-17T07:14:49","slug":"hur-mycket-kan-en-magnet-lyfta","status":"publish","type":"post","link":"https:\/\/blog.edu.turku.fi\/scienceed\/2019\/12\/17\/hur-mycket-kan-en-magnet-lyfta\/","title":{"rendered":"Hur mycket kan en magnet lyfta?"},"content":{"rendered":"<p>Ett experiment som inneh\u00e5ller b\u00e5de naturvetenskap och praktisk matematik. Alex r\u00e4k<img loading=\"lazy\" decoding=\"async\" class=\"alignright size-large wp-image-524\" src=\"https:\/\/blog.edu.turku.fi\/scienceed\/files\/2019\/12\/magnet-29094_960_720-300x338.png\" alt=\"\" width=\"300\" height=\"338\" srcset=\"https:\/\/blog.edu.turku.fi\/scienceed\/files\/2019\/12\/magnet-29094_960_720.png 300w, https:\/\/blog.edu.turku.fi\/scienceed\/files\/2019\/12\/magnet-29094_960_720-266x300.png 266w\" sizes=\"auto, (max-width: 300px) 85vw, 300px\" \/>nade till 137 spikar som satt fast p\u00e5 magneten och hade s\u00e4kert kunnat r\u00e4kna l\u00e4ngre om inte spikarna i l\u00e5dan hade tagit slut. Kan alla magneter h\u00e5lla lika m\u00e5nga saker, eller skiljer det sig, och i s\u00e5 fall varf\u00f6r? N\u00e5got att unders\u00f6ka!<\/p>\n<p>Om ni vill kan ni b\u00f6rja med att:<\/p>\n<h2>G\u00f6ra en egen magnet<\/h2>\n<p>Tag en magnet och stryk en n\u00e5l flera g\u00e5nger (cirka 20 g\u00e5nger beh\u00f6vs) efter \u00e4nden p\u00e5 magneten, men hela tiden \u00e5t samma h\u00e5ll, inte fram och tillbaka. Prova att plocka upp n\u00e5got av metall med stickan\/n\u00e5len. Fungerar det? D\u00e5 har du gjort en magnet som v\u00e4nder sig s\u00e5 den har nord\u00e4ndan mot den magnetiska sydpolen och syd\u00e4ndan mot den magnetiska nordpolen.<\/p>\n<p>Genom att dra med magneten mot n\u00e5len vrider sig m\u00e5nga av j\u00e4rnatomerna i n\u00e5len s\u00e5 deras magnetf\u00e4lt b\u00f6rjar samverka. Detta g\u00f6r att n\u00e5len b\u00f6rjar fungera som en magnet.<\/p>\n<h2>Hur stark \u00e4r din magnet?<\/h2>\n<ul>\n<li>Vad kan den dra?<\/li>\n<li>Hur mycket kan den lyfta?<\/li>\n<li>Hur m\u00e5nga t\u00e5gvagnar kan magneten h\u00e5lla samtidigt i en l\u00e5ng kedja, innan kedjan bryts?<\/li>\n<li>Kan den f\u00e5 metallf\u00f6rem\u00e5l att hoppa upp fr\u00e5n bordet?<\/li>\n<li>Hur h\u00f6gt i s\u00e5 fall?<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Ett experiment som inneh\u00e5ller b\u00e5de naturvetenskap och praktisk matematik. Alex r\u00e4knade till 137 spikar som satt fast p\u00e5 magneten och hade s\u00e4kert kunnat r\u00e4kna l\u00e4ngre om inte spikarna i l\u00e5dan hade tagit slut. Kan alla magneter h\u00e5lla lika m\u00e5nga saker, eller skiljer det sig, och i s\u00e5 fall varf\u00f6r? N\u00e5got att unders\u00f6ka! Om ni vill &hellip; <a href=\"https:\/\/blog.edu.turku.fi\/scienceed\/2019\/12\/17\/hur-mycket-kan-en-magnet-lyfta\/\" class=\"more-link\">Forts\u00e4tt l\u00e4sa<span class=\"screen-reader-text\"> \u201dHur mycket kan en magnet lyfta?\u201d<\/span><\/a><\/p>\n","protected":false},"author":2590,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[218561,4842,218347],"tags":[],"class_list":["post-523","post","type-post","status-publish","format-standard","hentry","category-experiment","category-fysik","category-veckans-ide"],"_links":{"self":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/523","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/users\/2590"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/comments?post=523"}],"version-history":[{"count":3,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/523\/revisions"}],"predecessor-version":[{"id":527,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/posts\/523\/revisions\/527"}],"wp:attachment":[{"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/media?parent=523"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/categories?post=523"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.edu.turku.fi\/scienceed\/wp-json\/wp\/v2\/tags?post=523"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}