{"id":420814,"date":"2017-06-15T02:00:00","date_gmt":"2017-06-14T23:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=9ff2c52fa5dee27da73cd85a8bb66098"},"modified":"2017-06-15T02:00:00","modified_gmt":"2017-06-14T23:00:00","slug":"magnetic-safety-matches","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=420814","title":{"rendered":"Magnetic safety matches"},"content":{"rendered":"<p>In addition to the main ingredients; sulfur, potassium chlorate and carbon, ordinary safety matches<br \/>\ncontain various dyes, glues etc, giving the head of the match an even texture and appealing color.<br \/>\nAmong the common reddish-brown matches there are several types, which after ignition can be<br \/>\nattracted by a strong magnet. Before ignition the match head is generally not attracted by the<br \/>\nmagnet. An elemental analysis based on proton-induced x-ray emission was performed to single out<br \/>\niron as the element responsible for the observed magnetism. 57 Fe M\u00f6ssbauer spectroscopy was used<br \/>\nfor identifying the various types of iron-compounds, present before and after ignition, responsible<br \/>\nfor the macroscopic magnetism: Fe 2 O 3 before and Fe 3 O 4 after. The reaction was verified by<br \/>\nmixing the main chemicals in the match-head with Fe 2 O 3 in glue and mounting the mixture on a<br \/>\nmatch stick. The ash residue after igniting the mixtu&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In addition to the main ingredients; sulfur, potassium chlorate and carbon, ordinary safety matches<br \/>\ncontain various dyes, glues etc, giving the head of the match an even texture and appealing color.<br \/>\nAmong the common reddish-brown matches there are se&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-420814","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/420814","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=420814"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/420814\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=420814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=420814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=420814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}