{"id":256526,"date":"2018-11-13T09:00:39","date_gmt":"2018-11-13T08:00:39","guid":{"rendered":"http:\/\/www.pcnen.com\/portal\/?p=256526"},"modified":"2018-11-14T09:55:13","modified_gmt":"2018-11-14T08:55:13","slug":"ni-kg-nece-biti-kao-nekad","status":"publish","type":"post","link":"https:\/\/www.pcnen.com\/portal\/2018\/11\/13\/ni-kg-nece-biti-kao-nekad\/","title":{"rendered":"Ni kg ne\u0107e biti kao nekad"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-medium wp-image-256527\" src=\"http:\/\/www.pcnen.com\/portal\/wp-content\/uploads\/2018\/11\/kilogram-etalon-300x220.jpg\" alt=\"\" width=\"300\" height=\"220\" srcset=\"https:\/\/www.pcnen.com\/portal\/wp-content\/uploads\/2018\/11\/kilogram-etalon.jpg 300w, https:\/\/www.pcnen.com\/portal\/wp-content\/uploads\/2018\/11\/kilogram-etalon-235x172.jpg 235w, https:\/\/www.pcnen.com\/portal\/wp-content\/uploads\/2018\/11\/kilogram-etalon-75x55.jpg 75w, https:\/\/www.pcnen.com\/portal\/wp-content\/uploads\/2018\/11\/kilogram-etalon-220x161.jpg 220w, https:\/\/www.pcnen.com\/portal\/wp-content\/uploads\/2018\/11\/kilogram-etalon-90x65.jpg 90w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>Nakon dugogodi\u0161njeg \u010duvanja ponekad pra\u0161njavog metalnog cilindra u sefu nedaleko od Pariza koji slu\u017ei kao svjetska referenca za jedinicu mase, nau\u010dnici sada \u017eele da pobolj\u0161aju definiciju kilograma, prenosi Jutarnji.hr.<\/p>\n<p>Kilogram je od 1889. definisan sjajnim komadom platine i iridijuma. Sve savremene jedinice mase izvode se iz njega &#8211; od mikrograma ljekova do kilograma jabuka i kru\u0161aka, te tona \u010delika ili cementa.<\/p>\n<p>Problem je u tome \u0161to &#8220;me\u0111unarodni prototip kilograma&#8221; nema uvijek jednaku te\u017einu. \u010cak i unutar tri staklena zvona bude pra\u0161njav i prljav i na njega ima uticaja atmosfera.<\/p>\n<p>Jednako kao i metar, nekada definisan du\u017einom \u0161ipke od platine i iridijumaa, koji se tako\u0111e \u010duva u Parizu, a koji je sada definisan konstantom brzine svjetlosti u vakuumu, tako \u0107e i kilogram biti definisan putem malene, ali nepromjenjive osnovne jedinice zvane <a href=\"https:\/\/sr.wikipedia.org\/sr-el\/%D0%9F%D0%BB%D0%B0%D0%BD%D0%BA%D0%BE%D0%B2%D0%B0_%D0%BA%D0%BE%D0%BD%D1%81%D1%82%D0%B0%D0%BD%D1%82%D0%B0\">Plankova konstanta.<\/a><\/p>\n<p>Nova definicija dobijena je pomo\u0107u ure\u0111aja koji se zove Kibleov mehanizam, a koji pomo\u0107u te konstante odre\u0111uje masu nekog predmeta koriste\u0107i precizno izmjerenu elektromagnetnu silu.<\/p>\n<p>Jednako kao \u0161to je redefinicija sekunde 1967. pomogla u pobolj\u0161anju komunikacija u svijetu putem tehnologija kao \u0161to su GPS i internet, stru\u010dnjaci ka\u017eu da \u0107e promjena kilograma biti bolja za tehnologiju, trgovinu i zdravlje.<\/p>\n<p>Za prosje\u010dnog potro\u0161a\u010da, koji kupuje bra\u0161no ili banana, ne\u0107e biti apsolutno nikakvih promjena.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kilogram \u0107e biti definisan putem Plankove konstante<\/p>\n","protected":false},"author":1,"featured_media":256527,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-256526","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zanimljivosti"],"_links":{"self":[{"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/posts\/256526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/comments?post=256526"}],"version-history":[{"count":0,"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/posts\/256526\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/media\/256527"}],"wp:attachment":[{"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/media?parent=256526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/categories?post=256526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pcnen.com\/portal\/wp-json\/wp\/v2\/tags?post=256526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}