{"id":7379,"date":"2013-05-22T12:43:41","date_gmt":"2013-05-22T11:43:41","guid":{"rendered":"http:\/\/www.eurosource.se\/akhe\/wordpress\/?p=7379"},"modified":"2016-01-13T11:09:21","modified_gmt":"2016-01-13T10:09:21","slug":"negativa-temperaturer","status":"publish","type":"post","link":"https:\/\/www.akehedman.se\/wordpress\/?p=7379","title":{"rendered":"Negativa temperaturer"},"content":{"rendered":"<p><a href=\"https:\/\/i0.wp.com\/www.eurosource.se\/akhe\/wordpress\/wp-content\/uploads\/2013\/05\/medel_max_min_1913-2008_780.gif\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7380 size-full\" src=\"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2013\/05\/medel_max_min_1913-2008_780.gif?resize=580%2C351\" alt=\"medel_max_min_1913-2008_780\" width=\"580\" height=\"351\" \/><\/a><\/p>\n<p>Jag l\u00e4ser om negativa temperaturer under lunchen. Inget konstigt f\u00f6r oss som \u00e4r vana Celsiusskalan s\u00e5klart men h\u00e4r pratar vi Kelvin. Ja ni vet 0 Kelvin \u00e4r 273.15 minusgrader i Celsius. Kelvin som utg\u00e5r fr\u00e5n den absoluta nollpunkten d\u00e4r alla molekylr\u00f6relse har upph\u00f6rt. \u00a0Nu pratar man allts\u00e5 om temperaturer som \u00e4r &#8220;kallare&#8221; \u00e4n s\u00e5. Dvs minus Kelvin temperatur.<\/p>\n<p>F\u00f6r att sp\u00f6ka till det lite mer s\u00e5 \u00e4r just dessa minus Kelvin temperaturer ocks\u00e5 de &#8220;hetaste&#8221; vi k\u00e4nner. Man n\u00e5r dit genom att hetta upp en gas i ett magnetf\u00e4lt. Vid en best\u00e4md temperatur s\u00e5 ordnar atomerna upp sig och st\u00e5r till slut helt stilla och man har f\u00e5tt en kvantgas. Temperatur \u00e4r ju per definition kopplat till molekylr\u00f6relse. S\u00e5 d\u00e4rf\u00f6r negativ temperatur. Inte nog med det &#8211; man f\u00e5r ett negativt tryck ocks\u00e5. D\u00e4r kan man f\u00e5 roliga konsekvenser som maskiner med mer \u00e4n 100% verkningsgrad. Hmmm&#8230; \ud83d\ude42<\/p>\n<p>Jag lyfts av den h\u00e4r artikeln. L\u00e4ngtar tillbaks lite till labben i Uppsala. Men framf\u00f6rallt f\u00e5r min j\u00e4mvikts teori mer vatten p\u00e5 sin kvarn. En bra lunch med andra ord.<\/p>\n<p><a href=\"http:\/\/sv.wikipedia.org\/wiki\/Negativ_temperatur\">Wikipedia har lite mer info<\/a>\u00a0f\u00f6r den vetgirige.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jag l\u00e4ser om negativa temperaturer under lunchen. Inget konstigt f\u00f6r oss som \u00e4r vana Celsiusskalan s\u00e5klart men h\u00e4r pratar vi Kelvin. Ja ni vet 0 Kelvin \u00e4r 273.15 minusgrader i Celsius. Kelvin som utg\u00e5r fr\u00e5n den absoluta nollpunkten d\u00e4r alla molekylr\u00f6relse har upph\u00f6rt. \u00a0Nu pratar man allts\u00e5 om temperaturer som \u00e4r &#8220;kallare&#8221; \u00e4n s\u00e5. Dvs [&hellip;]<\/p>\n","protected":false},"author":24,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[24],"tags":[],"class_list":["post-7379","post","type-post","status-publish","format-standard","hentry","category-betraktelser"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[{"id":23679,"url":"https:\/\/www.akehedman.se\/wordpress\/?p=23679","url_meta":{"origin":7379,"position":0},"title":"Moduler och kylsk\u00e5psreparationer","author":"\u00c5ke Hedman","date":"2017-03-13","format":false,"excerpt":"Varning! Tekniskt inneh\u00e5ll! Byggblock till kylsk\u00e5p, ja det \u00e4r meningen att saker skall monteras och k\u00f6ras ig\u00e5ng idag, eller \u00e5tminstone testas, men annat f\u00e5r prioriteras, man m\u00e5ste leva ocks\u00e5, s\u00e5dant g\u00e5r alltid f\u00f6rst, s\u00e5klart, hur skulle det annars se ut? Jod\u00e5, byggblock som \u00e4r overkill s\u00e5klart. Grodans Beijing module och\u2026","rel":"","context":"In &quot;Betraktelser &amp; Ber\u00e4ttelse&quot;","block_context":{"text":"Betraktelser &amp; Ber\u00e4ttelse","link":"https:\/\/www.akehedman.se\/wordpress\/?cat=24"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2017\/03\/20170313_213206-1024x576.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2017\/03\/20170313_213206-1024x576.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2017\/03\/20170313_213206-1024x576.png?resize=525%2C300 1.5x"},"classes":[]},{"id":19476,"url":"https:\/\/www.akehedman.se\/wordpress\/?p=19476","url_meta":{"origin":7379,"position":1},"title":"Minus","author":"\u00c5ke Hedman","date":"2016-01-14","format":false,"excerpt":"Nitton minus ute. Kallt. Minus 3.5 under sn\u00f6n. Varmare. Pudersn\u00f6 isolerar tydligen. N\u00e4sta \u00e5r skall jag gr\u00e4va ner en sensor en bit under marken f\u00f6r att f\u00e5 en temperatur d\u00e4rifr\u00e5n ocks\u00e5. Till ingen nytta alls s\u00e5klart. Som allt jag g\u00f6r. Men \u00e5 andra sidan om man kunde g\u00f6mma hela huset\u2026","rel":"","context":"In &quot;Betraktelser &amp; Ber\u00e4ttelse&quot;","block_context":{"text":"Betraktelser &amp; Ber\u00e4ttelse","link":"https:\/\/www.akehedman.se\/wordpress\/?cat=24"},"img":{"alt_text":"katterna2","src":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2014\/05\/katterna2-1024x768.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2014\/05\/katterna2-1024x768.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2014\/05\/katterna2-1024x768.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":44189,"url":"https:\/\/www.akehedman.se\/wordpress\/?p=44189","url_meta":{"origin":7379,"position":2},"title":"Oj","author":"\u00c5ke Hedman","date":"2023-01-31","format":false,"excerpt":"Photo by Tim Gouw on Pexels.com Ja just det \"OJ\" vilken dag. F\u00f6rutom att jag h\u00e5ller p\u00e5 att frysa tungan av mig, ja alla utstickande delar av kroppen h\u00e5ller p\u00e5 att frysa till is denna dag. Kallt. S\u00e5 in i helvete. I alla fall f\u00f6r en fryslort. Som jag. Termometern\u2026","rel":"","context":"In &quot;Betraktelser &amp; Ber\u00e4ttelse&quot;","block_context":{"text":"Betraktelser &amp; Ber\u00e4ttelse","link":"https:\/\/www.akehedman.se\/wordpress\/?cat=24"},"img":{"alt_text":"yellow flowers","src":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2023\/01\/pexels-photo-443420.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2023\/01\/pexels-photo-443420.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2023\/01\/pexels-photo-443420.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2023\/01\/pexels-photo-443420.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2023\/01\/pexels-photo-443420.jpeg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2023\/01\/pexels-photo-443420.jpeg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":43744,"url":"https:\/\/www.akehedman.se\/wordpress\/?p=43744","url_meta":{"origin":7379,"position":3},"title":"Jul h\u00e4r","author":"\u00c5ke Hedman","date":"2022-12-24","format":false,"excerpt":"Ledsen f\u00f6r att en gammal draft verkar sp\u00f6ka h\u00e4r p\u00e5 bloggen. Tv\u00e5 g\u00e5nger till och med. Men det \u00e4r v\u00e4l s\u00e5 med sp\u00f6ken De \u00e5terkommer. S\u00e5 kanske dyker den upp igen den rackaren. Jul h\u00e4r i huset. Utan \u00e4ldste sonen som ligger sjuk i Covid. Saknad. Synd. Men det blir\u2026","rel":"","context":"In &quot;Betraktelser &amp; Ber\u00e4ttelse&quot;","block_context":{"text":"Betraktelser &amp; Ber\u00e4ttelse","link":"https:\/\/www.akehedman.se\/wordpress\/?cat=24"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2022\/12\/IMG_20221223_0934352-scaled.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2022\/12\/IMG_20221223_0934352-scaled.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2022\/12\/IMG_20221223_0934352-scaled.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2022\/12\/IMG_20221223_0934352-scaled.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2022\/12\/IMG_20221223_0934352-scaled.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2022\/12\/IMG_20221223_0934352-scaled.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":37398,"url":"https:\/\/www.akehedman.se\/wordpress\/?p=37398","url_meta":{"origin":7379,"position":4},"title":"P\u00e5 med m\u00f6ssan","author":"\u00c5ke Hedman","date":"2021-01-05","format":false,"excerpt":"Det \u00e4r vinter. Vinter p\u00e5 riktigt. Tolv minus n\u00e4r jag vaknar. Men om man har f\u00f6r avsikt att stanna inne hela dagen - i alla fall i princip - s\u00e5 g\u00f6r v\u00e4l inte det d\u00e4r n\u00e5got. Men kallt allts\u00e5. Fast vi klarar oss s\u00e5klart ganska bra h\u00e4r uppe p\u00e5 kullen.\u2026","rel":"","context":"In &quot;Betraktelser &amp; Ber\u00e4ttelse&quot;","block_context":{"text":"Betraktelser &amp; Ber\u00e4ttelse","link":"https:\/\/www.akehedman.se\/wordpress\/?cat=24"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2021\/01\/Screenshot-from-2021-01-05-10-03-15.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2021\/01\/Screenshot-from-2021-01-05-10-03-15.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2021\/01\/Screenshot-from-2021-01-05-10-03-15.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2021\/01\/Screenshot-from-2021-01-05-10-03-15.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":22587,"url":"https:\/\/www.akehedman.se\/wordpress\/?p=22587","url_meta":{"origin":7379,"position":5},"title":"Bla bla bla bla bla bla bla bla bla&#8230;","author":"\u00c5ke Hedman","date":"2016-12-19","format":false,"excerpt":"Sju grader varmt h\u00e4r ute. V\u00e4rlden sm\u00e4lter. I de h\u00f6ga temperaturerna kan det inte ens vara halt. Isen faller ihop. Men jag tror fortfarande p\u00e5 en vit jul. Vi har fortfarande tillr\u00e4ckligt med packad sn\u00f6 f\u00f6r att sn\u00f6t\u00e4cket skall t\u00e5la n\u00e5gra dagars blidv\u00e4der. Men det \u00e4r en konstig k\u00e4nsla att\u2026","rel":"","context":"In &quot;Betraktelser &amp; Ber\u00e4ttelse&quot;","block_context":{"text":"Betraktelser &amp; Ber\u00e4ttelse","link":"https:\/\/www.akehedman.se\/wordpress\/?cat=24"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2016\/12\/Screenshot-from-2016-12-19-132740-1024x466.png?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2016\/12\/Screenshot-from-2016-12-19-132740-1024x466.png?resize=350%2C200 1x, https:\/\/i0.wp.com\/www.akehedman.se\/wordpress\/wp-content\/uploads\/2016\/12\/Screenshot-from-2016-12-19-132740-1024x466.png?resize=525%2C300 1.5x"},"classes":[]}],"jetpack_shortlink":"https:\/\/wp.me\/p68PL2-1V1","_links":{"self":[{"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7379","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7379"}],"version-history":[{"count":3,"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7379\/revisions"}],"predecessor-version":[{"id":19460,"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7379\/revisions\/19460"}],"wp:attachment":[{"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7379"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7379"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.akehedman.se\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7379"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}