{"id":65146,"date":"2026-07-05T05:40:44","date_gmt":"2026-07-04T20:40:44","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=65146"},"modified":"2026-07-05T05:40:44","modified_gmt":"2026-07-04T20:40:44","slug":"amparista-ja-putkesta-tiedelabra-aanen-aallonpituuden-mittaaminen-alypuhelimella-ilmapatsaan-resonanssikoe","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=65146&lang=fi","title":{"rendered":"\u00c4mp\u00e4rist\u00e4 ja putkesta tiedelabra! \u00c4\u00e4nen aallonpituuden mittaaminen \u00e4lypuhelimella (ilmapatsaan resonanssikoe)"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><strong>Tiedekouluttaja Ken Kuwako t\u00e4\u00e4ll\u00e4. Joka p\u00e4iv\u00e4 on koep\u00e4iv\u00e4.<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-25928 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2016\/09\/8eb12a4ac52539342f9185384fc4244a.jpg\" alt=\"%e3%82%b9%e3%82%af%e3%83%aa%e3%83%bc%e3%83%b3%e3%82%b7%e3%83%a7%e3%83%83%e3%83%88-2016-09-09-8-19-08\" width=\"126\" height=\"119\" \/><br \/>\nT\u00e4ll\u00e4 kertaa esittelen kokeen, jossa tutkitaan \u00e4\u00e4nen resonanssi-ilmi\u00f6t\u00e4 iPhone-sovelluksen <a href=\"https:\/\/www.google.com\/url?sa=t&amp;source=web&amp;rct=j&amp;opi=89978449&amp;url=https:\/\/apps.apple.com\/jp\/app\/audio-function-generator\/id768229610&amp;ved=2ahUKEwjrkfKq286OAxUlrlYBHQT5N-YQFnoECB0QAQ&amp;usg=AOvVaw0oAFzW4v9iHtPS3ALsmbtV\">A\u0192G \u2013 Audio Function Generator<\/a> avulla. T\u00e4m\u00e4n kokeen kautta oppilaat p\u00e4\u00e4sev\u00e4t konkreettisesti kokemaan \u00e4\u00e4nen aallonpituuden ja taajuuden v\u00e4lisen yhteyden, ja he voivat jopa laskennallisesti johtaa t\u00e4m\u00e4n yhteyden \u2013 kaikki t\u00e4m\u00e4 samalla, kun fysiikan perusteiden opiskelu muuttuu hauskaksi. Ja mik\u00e4 parasta, kaikki tarvittava l\u00f6ytyy jo l\u00e4helt\u00e4si. T\u00e4m\u00e4n kokeen voi ottaa k\u00e4ytt\u00f6\u00f6n luokkahuoneessa jo huomenna.<\/p>\n<h3>Mitataan \u00e4\u00e4nen aallonpituus resonanssin avulla!<\/h3>\n<p>T\u00e4ss\u00e4 kokeessa hy\u00f6dynnet\u00e4\u00e4n &#8220;resonanssia&#8221; \u2013 ilmi\u00f6t\u00e4, jossa \u00e4\u00e4ni kuuluu erityisen voimakkaana tietyiss\u00e4 olosuhteissa. Resonanssi on eritt\u00e4in t\u00e4rke\u00e4 ilmi\u00f6 aaltoliikkeen ymm\u00e4rt\u00e4misen kannalta. Kun saamme \u00e4\u00e4nen resonoimaan akryyliputkessa, joka on upotettu veteen, voimme havainnoida \u00e4\u00e4nen aallonpituuden visuaalisesti ja laskea \u00e4\u00e4nen taajuuden.<\/p>\n<h4>Tarvitset seuraavat:<\/h4>\n<ul>\n<li><b>Akryyliputki<\/b>: noin 50 cm pitk\u00e4 putki sopii hyvin. N\u00e4it\u00e4 l\u00f6ytyy rautakaupoista noin 800 jenin hintaan. Jos putken sis\u00e4halkaisija on liian suuri, resonanssia on vaikeampi saada aikaan \u2013 valitse siis kapeampi putki.<\/li>\n<li><b>iPhone<\/b>: johon on asennettu sovellus &#8220;A\u0192G \u2013 Audio Function Generator&#8221;. (Yksi puhelin per ryhm\u00e4 riitt\u00e4\u00e4 hyvin. Kannattaa pyyt\u00e4\u00e4 oppilaita asentamaan sovellus etuk\u00e4teen, jotta kokeen aloittaminen sujuu jouhevasti.)<\/li>\n<li><b>Vesiallas<\/b>: tarpeeksi syv\u00e4, jotta akryyliputki mahtuu siihen pystyasennossa ja vett\u00e4 on riitt\u00e4v\u00e4sti.<\/li>\n<li><b>Tarra<\/b> tai <b>huopakyn\u00e4<\/b>: n\u00e4ill\u00e4 merkit\u00e4\u00e4n resonanssikohdat. Jos k\u00e4yt\u00f6ss\u00e4 on putkeen kiinnitett\u00e4v\u00e4 mittanauha, pituuden mittaaminen k\u00e4y entist\u00e4kin tarkemmin.<\/li>\n<\/ul>\n<h4>Kokeen kulku:<\/h4>\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-22799\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5-300x261.jpg\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2015-09-30 7.47.42\" width=\"328\" height=\"285\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5-300x261.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5.jpg 467w\" sizes=\"auto, (max-width: 328px) 100vw, 328px\" \/><\/a><\/p>\n<p><iframe loading=\"lazy\" title=\"\u7f8e\uff01iPhone\u3068\u30d1\u30a4\u30d7\u304c\u594f\u3067\u308b\u6c17\u4e2d\u306e\u97f3\u8272\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/i-Plg3f7x34?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<ol start=\"1\">\n<li><b>Sovelluksen asennusohje<\/b>: Pyyd\u00e4 oppilaita asentamaan &#8220;A\u0192G \u2013 Audio Function Generator&#8221; -sovellus omiin iPhoneihinsa etuk\u00e4teen. Jos koe tehd\u00e4\u00e4n kotona, t\u00e4t\u00e4 vaihetta ei tarvita.<\/li>\n<li><b>T\u00e4yt\u00e4 vesiallas<\/b>: T\u00e4yt\u00e4 allas vedell\u00e4 \u00e4\u00e4ri\u00e4\u00e4n my\u00f6ten. Pid\u00e4 vedenpinta mahdollisimman tyynen\u00e4.<\/li>\n<li><b>Aseta akryyliputki paikoilleen<\/b>: Aseta akryyliputki pystysuoraan altaaseen. Varmista, ettei putki kaadu.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-26630 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/01\/646cfea5832742cdc2022c37eef6f5e5.jpg\" alt=\"\" width=\"428\" height=\"440\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/01\/646cfea5832742cdc2022c37eef6f5e5.jpg 428w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/01\/646cfea5832742cdc2022c37eef6f5e5-292x300.jpg 292w\" sizes=\"auto, (max-width: 428px) 100vw, 428px\" \/><\/li>\n<li><b>Kiinnit\u00e4 iPhone ja soita \u00e4\u00e4nt\u00e4<\/b>: K\u00e4ynnist\u00e4 &#8220;A\u0192G&#8221;-sovellus iPhonessa ja valitse sopiva taajuus (esim. 400\u2013800 Hz v\u00e4lilt\u00e4). Kiinnit\u00e4 iPhone putken yl\u00e4p\u00e4\u00e4h\u00e4n niin, ett\u00e4 \u00e4\u00e4nil\u00e4hde osoittaa putken suuaukkoa kohti.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22688 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/8362c708e4e490f8f5b0639c76f252f9-130x300.jpg\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2015-09-21 23.40.49\" width=\"130\" height=\"300\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/8362c708e4e490f8f5b0639c76f252f9-130x300.jpg 130w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/8362c708e4e490f8f5b0639c76f252f9.jpg 305w\" sizes=\"auto, (max-width: 130px) 100vw, 130px\" \/><br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-26626 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/01\/feeb7836754a34f6129295a1dddc58cc.jpg\" alt=\"\" width=\"342\" height=\"449\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/01\/feeb7836754a34f6129295a1dddc58cc.jpg 342w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/01\/feeb7836754a34f6129295a1dddc58cc-229x300.jpg 229w\" sizes=\"auto, (max-width: 342px) 100vw, 342px\" \/><\/li>\n<li><b>Etsi resonanssikohta (1. kerta)<\/b>: Pid\u00e4 iPhonea kiinni putkessa ja liikuta sit\u00e4 hitaasti yl\u00f6s ja alas. Kuuntele tarkasti, l\u00f6ytyyk\u00f6 kohta, jossa \u00e4\u00e4ni yht\u00e4kki\u00e4 voimistuu selv\u00e4sti. T\u00e4m\u00e4 on \u00e4\u00e4nen &#8220;resonanssikohta&#8221;.<br \/>\n<a href=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/0829a0ec2c6a1d340e8ce603e01f67dd.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22687 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/0829a0ec2c6a1d340e8ce603e01f67dd-144x300.jpg\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2015-09-21 23.41.22\" width=\"144\" height=\"300\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/0829a0ec2c6a1d340e8ce603e01f67dd-144x300.jpg 144w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/0829a0ec2c6a1d340e8ce603e01f67dd.jpg 352w\" sizes=\"auto, (max-width: 144px) 100vw, 144px\" \/><\/a><\/li>\n<li><b>Merkitse resonanssikohta (1. kerta)<\/b>: Kun l\u00f6yd\u00e4t kohdan, jossa \u00e4\u00e4ni on voimakkaimmillaan, mittaa et\u00e4isyys vedenpinnan ja putken yl\u00e4reunan v\u00e4lill\u00e4. Merkitse t\u00e4m\u00e4 kohta tarralla tai huopakyn\u00e4ll\u00e4.<\/li>\n<li><b>Etsi resonanssikohta (2. kerta)<\/b>: Liikuta putkea edelleen yl\u00f6s ja alas ja etsi toinen kohta, jossa \u00e4\u00e4ni voimistuu. T\u00e4m\u00e4n pit\u00e4isi sijaita alempana kuin ensimm\u00e4inen l\u00f6yt\u00e4m\u00e4si resonanssikohta.<\/li>\n<li><b>Merkitse resonanssikohta (2. kerta)<\/b>: Kun toinen resonanssikohta l\u00f6ytyy, merkitse my\u00f6s se samalla tavalla.<\/li>\n<li><b>Mittaa aallonpituus<\/b>: Mittaa et\u00e4isyys kahden resonanssikohdan (tarrojen) v\u00e4lilt\u00e4. T\u00e4m\u00e4 et\u00e4isyys vastaa tarkalleen puolta \u00e4\u00e4nen aallonpituudesta (\u03bb \/ 2<span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord cjk_fallback\">\uff09\u306b\u76f8\u5f53\u3057\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u6e2c\u5b9a\u3057\u305f\u8ddd\u96e2\u3092<\/span><span class=\"mord\">2<\/span><span class=\"mord cjk_fallback\">\u500d\u3059\u308c\u3070\u3001\u305d\u306e\u97f3\u306e\u6ce2\u9577<\/span><\/span><\/span><\/span><\/span>. Kertomalla mitatun et\u00e4isyyden kahdella saat siis selville \u00e4\u00e4nen aallonpituuden \u03bb.<\/li>\n<\/ol>\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/99d3979275607097c3fba2577c5df80a.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-22871\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/99d3979275607097c3fba2577c5df80a-259x300.jpg\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2015-10-05 8.06.09\" width=\"259\" height=\"300\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/99d3979275607097c3fba2577c5df80a-259x300.jpg 259w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/99d3979275607097c3fba2577c5df80a.jpg 638w\" sizes=\"auto, (max-width: 259px) 100vw, 259px\" \/><\/a><\/p>\n<h3>[Tietovisa] Onko ilma hieman &#8220;yli&#8221;? Suuaukkokorjauksen mysteeri<\/h3>\n<p>Kun teet t\u00e4m\u00e4n kokeen, huomaat pian mielenkiintoisen ristiriidan: <b>&#8220;laskennallinen aallon pituus&#8221; ei t\u00e4sm\u00e4\u00e4 t\u00e4ysin &#8220;putken todellisen pituuden&#8221; kanssa<\/b>.<br \/>\nEr\u00e4\u00e4ss\u00e4 ryhm\u00e4ss\u00e4 resonanssi havaittiin putken suulta mitattuna <b>0,415 metrin<\/b> kohdalla. Kun ryhm\u00e4 mittasi kahden resonanssikohdan v\u00e4lisen et\u00e4isyyden (puoli aallonpituutta) ja laski sen perusteella aallonpituuden, tulokseksi saatiin <b>0,34 metri\u00e4<\/b>.<br \/>\nT\u00e4m\u00e4n tiedon avulla voimme p\u00e4\u00e4tell\u00e4, millainen seisova aalto putkessa muodostuu, ja laskea niin sanotun <b>suuaukkokorjauksen<\/b>.<br \/>\n<b>Vihje:<\/b> Jos aallonpituus on 0,34 metri\u00e4, perustaajuuden (1\/4 aallonpituudesta) pituus on 0,34 \u00f7 4 = <b>0,085 metri\u00e4<\/b>. T\u00e4m\u00e4n kokeen resonanssikohta 0,415 m on l\u00e4hell\u00e4 lukua, joka on noin viisi kertaa 0,085 m (eli 0,425 m). T\u00e4m\u00e4 viittaa siihen, ett\u00e4 kyseess\u00e4 on viidenkertainen v\u00e4r\u00e4htely (kolmas resonanssikohta).<br \/>\nMutta laskennallisen 0,425 metrin sijaan mitattu arvo oli vain 0,415 metri\u00e4. Juuri t\u00e4m\u00e4 ero on se osa, jossa <b>\u00e4\u00e4ni &#8220;ty\u00f6ntyy&#8221; hieman putken suuaukon ulkopuolelle v\u00e4r\u00e4hdelless\u00e4\u00e4n<\/b> \u2013 t\u00e4t\u00e4 kutsutaan suuaukkokorjaukseksi.<br \/>\n0,425 m \u2212 0,415 m = ???<br \/>\nMik\u00e4s on vastaus senttimetrein\u00e4? (Vastaus on 1 cm!) T\u00e4ll\u00e4 tavoin, yhdist\u00e4m\u00e4ll\u00e4 mitatut arvot ja teoreettiset laskelmat, voimme mitata jopa silm\u00e4lle n\u00e4kym\u00e4tt\u00f6m\u00e4n ilman &#8220;ylivenym\u00e4n&#8221; \u2013 juuri t\u00e4m\u00e4 on fysiikan kokeiden hienointa antia.<\/p>\n<h3>\u00c4\u00e4nen nopeuden laskeminen ja taajuuksien vertailu<\/h3>\n<p>Mittaa ensin kokeen suorituspaikan l\u00e4mp\u00f6tila. K\u00e4yt\u00e4 sitten seuraavaa kaavaa laskeaksesi \u00e4\u00e4nen nopeuden <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">v<\/span><\/span><\/span><\/span><\/span> kyseisess\u00e4 l\u00e4mp\u00f6tilassa: <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">v<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord\">331.5<\/span><span class=\"mbin\">+<\/span><\/span><span class=\"base\"><span class=\"mord\">0.6<\/span><span class=\"mord mathnormal\">t<\/span><\/span><\/span><\/span><\/span> (jossa <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">t<\/span><\/span><\/span><\/span><\/span> on l\u00e4mp\u00f6tila Celsius-asteina). Lopuksi k\u00e4yt\u00e4 saatua \u00e4\u00e4nen nopeutta <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">v<\/span><\/span><\/span><\/span><\/span> ja mitattua aallonpituutta <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">\u03bb<\/span><\/span><\/span><\/span><\/span> laskeaksesi \u00e4\u00e4nen taajuuden <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">f<\/span><\/span><\/span><\/span><\/span> seuraavan kaavan avulla: <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">v<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">f<\/span><span class=\"mord mathnormal\">\u03bb<\/span><\/span><\/span><\/span><\/span>, josta saadaan <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">f<\/span><span class=\"mrel\">=<\/span><\/span><span class=\"base\"><span class=\"mord mathnormal\">v<\/span><span class=\"mord\">\/<\/span><span class=\"mord mathnormal\">\u03bb<\/span><\/span><\/span><\/span><\/span>.<br \/>\nVertaa t\u00e4t\u00e4 laskennallista taajuutta iPhonen &#8220;A\u0192G&#8221;-sovellukseen asetettuun taajuuteen. Niiden pit\u00e4isi olla l\u00e4hes samat.<\/p>\n<h3>Miksi resonanssi syntyy?<\/h3>\n<p>T\u00e4m\u00e4 koe hy\u00f6dynt\u00e4\u00e4 <b>suljetun putken resonanssia<\/b>. Kun \u00e4\u00e4nen aalto heijastuu vedenpinnasta, putkeen syntyy seisova aalto. Seisova aalto on aalto, joka n\u00e4ytt\u00e4\u00e4 pysyv\u00e4n paikallaan etenem\u00e4tt\u00e4 \u2013 tietyiss\u00e4 kohdissa (solmukohdissa) v\u00e4r\u00e4htely on l\u00e4hes olematonta, kun taas toisissa kohdissa (kuvunkohdissa) v\u00e4r\u00e4htely on voimakasta.<br \/>\nT\u00e4ss\u00e4 kokeessa putken suuaukko toimii &#8220;kuvunkohtana&#8221; (voimakas v\u00e4r\u00e4htely) ja vedenpinta &#8220;solmukohtana&#8221; (l\u00e4hes ei v\u00e4r\u00e4htely\u00e4). Yksinkertaisin resonanssin muoto syntyy, kun putken pituus on <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">1\/4<\/span><\/span><\/span><\/span><\/span> aallonpituudesta. Seuraava resonanssi syntyy, kun pituus on <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">3\/4<\/span><\/span><\/span><\/span><\/span> aallonpituudesta, sitten <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">5\/4<\/span><\/span><\/span><\/span><\/span>\u2026 ja niin edelleen \u2013 resonanssi syntyy aina aallonpituuden parittomilla kertoimilla.<br \/>\nT\u00e4ss\u00e4 kokeessa l\u00f6ydetyt kaksi resonanssikohtaa vastaavat putken pituuksia \u03bb\/4 ja <span class=\"math-inline\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\">3<\/span><span class=\"mord mathnormal\">\u03bb<\/span><span class=\"mord\">\/4<\/span><\/span><\/span><\/span><\/span>. N\u00e4iden kahden resonanssikohdan v\u00e4linen et\u00e4isyys on juuri (3\u03bb\/4) \u2212 (\u03bb\/4) = 2\u03bb\/4 = \u03bb\/2, joten kaksinkertaistamalla t\u00e4m\u00e4n et\u00e4isyyden saadaan tarkka aallonpituus.<\/p>\n<h3>Miten oppilaat oikeasti reagoivat luokassa<\/h3>\n<p>Kun kokeilimme t\u00e4t\u00e4 k\u00e4yt\u00e4nn\u00f6ss\u00e4, oppilaat asensivat innoissaan \u00e4\u00e4nigeneraattorisovelluksen ja etsiv\u00e4t ryhmiss\u00e4 resonanssikohtia t\u00e4ydell\u00e4 keskittymisell\u00e4. &#8220;T\u00e4\u00e4ll\u00e4 \u00e4\u00e4ni voimistuu!&#8221; -huudahduksia kuului joka puolelta, ja kun oppilaat itse mittasivat aallonpituuden ja laskivat siit\u00e4 taajuuden, joka osui l\u00e4hes tarkalleen sovellukseen asetettuun arvoon, ilo ja onnistumisen tunne olivat k\u00e4sin kosketeltavia.<br \/>\nYll\u00e4tys siit\u00e4, ett\u00e4 &#8220;puhelimella voi tehd\u00e4 t\u00e4llaistakin&#8221;, ja oivallus siit\u00e4, ett\u00e4 &#8220;arkiset esineet liittyv\u00e4t tieteeseen&#8221;, her\u00e4tt\u00e4v\u00e4t varmasti oppilaissa suurta uteliaisuutta. Yksi puhelin per ryhm\u00e4 riitt\u00e4\u00e4, joten valmisteluihin ei mene paljon aikaa.<\/p>\n<h3>Kokeiluv\u00e4lineen kehitystarina: n\u00e4in syntyi KW-1<\/h3>\n<p>Itse asiassa juuri t\u00e4m\u00e4 k\u00e4sintehty resonanssikoe johti yhteisty\u00f6h\u00f6n oppimateriaaliyrityksen Narikan kanssa, jonka tuloksena syntyi ilmapatsaan resonanssilaite &#8220;KW-1&#8221;. Kun esittelin Narika Science Academyssa (NSA) koetta, jossa k\u00e4ytin \u00e4mp\u00e4ri\u00e4 ja PVC-putkea, Narikan henkil\u00f6kunta sattui seuraamaan esityst\u00e4. He ajattelivat, ett\u00e4 kokeesta voisi tehd\u00e4 viel\u00e4 helpomman toteuttaa, ja ryhtyiv\u00e4t kehitt\u00e4m\u00e4\u00e4n laitetta.<br \/>\nMuuten, laitteen nimi &#8220;KW&#8221; on muka leikkimielisesti annettu sukunimeni &#8220;Kuwako&#8221; mukaan. Arkinen, k\u00e4sin tehty koe johti odottamattomalla tavalla varsinaisen opetusv\u00e4lineen syntyyn \u2013 t\u00e4llaiset kohtaamiset ovat mielest\u00e4ni yksi tieteen parhaista puolista.<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-37911 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/b5663dc20606e04d3f1b0efbbd26f547.jpg\" sizes=\"auto, (max-width: 408px) 100vw, 408px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/b5663dc20606e04d3f1b0efbbd26f547.jpg 750w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/b5663dc20606e04d3f1b0efbbd26f547-187x300.jpg 187w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/b5663dc20606e04d3f1b0efbbd26f547-639x1024.jpg 639w\" alt=\"\" width=\"258\" height=\"414\" \/><\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"krO3QmsB6f\"><p><a href=\"https:\/\/phys-edu.net\/wp\/?p=37910\">\u3010\u958b\u767a\u3011\u30d0\u30b1\u30c4\u3068\u5869\u30d3\u30d1\u30a4\u30d7\u304b\u3089\u751f\u307e\u308c\u305f\u767a\u660e \u6c17\u67f1\u5171\u9cf4\u88c5\u7f6eKW-1\u8a95\u751f\u79d8\u8a71<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; visibility: hidden;\" title=\"\u201c\u3010\u958b\u767a\u3011\u30d0\u30b1\u30c4\u3068\u5869\u30d3\u30d1\u30a4\u30d7\u304b\u3089\u751f\u307e\u308c\u305f\u767a\u660e \u6c17\u67f1\u5171\u9cf4\u88c5\u7f6eKW-1\u8a95\u751f\u79d8\u8a71\u201d \u2014 \u79d1\u5b66\u306e\u30cd\u30bf\u5e33\" src=\"https:\/\/phys-edu.net\/wp\/?p=37910&amp;embed=true#?secret=A8Zguj9uMZ#?secret=krO3QmsB6f\" data-secret=\"krO3QmsB6f\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<h3>Yhteystiedot ja yhteydenotot<\/h3>\n<p>Tuodaan tieteen ihmeet ja hauskuus l\u00e4hemm\u00e4s arkea! T\u00e4\u00e4lt\u00e4 l\u00f6yd\u00e4t helposti ymm\u00e4rrett\u00e4vi\u00e4 vinkkej\u00e4 ja hauskoja tieteellisi\u00e4 kokeita, joita voi tehd\u00e4 kotona. K\u00e4y tutustumassa!<br \/>\n\u30fbTiedevihkosen sis\u00e4lt\u00f6 on nyt julkaistu kirjana. Lis\u00e4tietoja <a href=\"https:\/\/amzn.to\/42PMCEL\">t\u00e4\u00e4lt\u00e4<\/a><br \/>\n\u30fbLis\u00e4tietoa sivuston yll\u00e4pit\u00e4j\u00e4st\u00e4 Ken Kuwakosta <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=37\">t\u00e4\u00e4lt\u00e4<\/a><br \/>\n\u30fbErilaiset toimeksiannot (kirjoitusty\u00f6t, luennot, kokeiluty\u00f6pajat, TV-konsultointi, esiintymiset yms.) <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">t\u00e4\u00e4lt\u00e4<\/a><br \/>\n<span class=\"s2\">\u30fbSeuraa artikkelip\u00e4ivityksi\u00e4 <a href=\"https:\/\/x.com\/kuwako\">X:ss\u00e4<\/a>!<\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.youtube.com\/user\/kkuwako\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35048\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/03\/3d9640dad7bc5538e76f92da1966ee19.jpg\" alt=\"\" width=\"30\" height=\"21\" \/><\/a><a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">Tiedejuttukanavalla<\/a> julkaistaan koevideoita!<\/p>\n<h3>\uff17\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n<p style=\"text-align: center;\">\u590f\u3067\u30d7\u30b7\u30e5\u30c3\u3068\u723d\u3084\u304b\u5b9f\u9a13\uff01<\/p>\r\n<p><img class=\"alignnone  wp-image-64964 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-06-30-4.31.58.jpeg\" alt=\"\" width=\"250\" height=\"310\" \/><\/p>\r\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=206\">\u5c0f\u578b\u3067\u6301\u3061\u5e30\u308c\u308b\u3088\uff01\u30da\u30c3\u30c8\u30dc\u30c8\u30eb\u30ed\u30b1\u30c3\u30c8\u3092\u4f5c\u308d\u3046\uff01<\/a><\/p>\r\n<h3 style=\"text-align: left;\"><span style=\"font-size: medium;\"><b><strong>\u30c6\u30ec\u30d3\u756a\u7d44\u76e3\u4fee\u30fb\u30a4\u30d9\u30f3\u30c8\u7b49\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n<li>\r\n<p>\u6642\u901f\uff12\uff10\uff10\uff4b\uff4d\u3067\u8d70\u308b\u30e9\u30f3\u30dc\u30eb\u30ae\u30fc\u30cb\u304c\u3001\u9577\u3055\uff11\uff12\uff4d\u306e\u30c6\u30fc\u30d6\u30eb\u30af\u30ed\u30b9\u3092\u4e00\u77ac\u3067\u5f15\u304d\u629c\u304f\u2014\u2014\u305d\u3093\u306a\u5e38\u8b58\u7834\u308a\u306e\u5b9f\u9a13\u304c\u3001\u3075\u305f\u305f\u3073\u30c6\u30ec\u30d3\u306e\u4e16\u754c\u3067\u5927\u304d\u306a\u8a71\u984c\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3057\u304b\u3082\u4eca\u56de\u306f\u300c\u8996\u8074\u8005\u304c\u9078\u3076\u30ef\u30af\u30ef\u30af\u5b9f\u9a13\u30e9\u30f3\u30ad\u30f3\u30b0\u300d\u3067\u3001\u306a\u3093\u3068\u5802\u3005\u306e\u7b2c\uff11\u4f4d\u3092\u7372\u5f97\u3057\u305f\u306e\u3067\u3059\u3002<a href=\"https:\/\/tver.jp\/episodes\/epxk5ysq54?p=781\">Tver\u3067\u307e\u3060\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u306e\u3067\u305c\u3072\u3054\u89a7\u304f\u3060\u3055\u3044<\/a>\u3002<\/p>\r\n<p><img class=\"alignnone  wp-image-65002 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-07-01-4.42.07.jpeg\" sizes=\"(max-width: 546px) 100vw, 546px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-07-01-4.42.07.jpeg 1052w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-07-01-4.42.07-300x162.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-07-01-4.42.07-1024x553.jpeg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-07-01-4.42.07-768x415.jpeg 768w\" alt=\"\" width=\"546\" height=\"295\" \/><\/p>\r\n<\/li>\r\n<li>7\u670818\u65e5\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=60018\">\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u300c\u30ca\u30ea\u30ab\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\u300d\u306e\u8b1b\u5e2b\u3092\u3057\u307e\u3059<\/a>\u3002\u304a\u4f1a\u3044\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\r\n<li>12\u670826\u65e5\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=64825\">\u30ca\u30ea\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\uff08\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\uff09\u958b\u50ac<\/a><\/li>\r\n<\/ul>\r\n<h3><b>\u66f8\u7c4d<strong>\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/h3>\r\n<ul>\r\n<li>\uff17\u670816\u65e5\u767a\u58f2\u3000\u300e<a href=\"https:\/\/amzn.to\/4vmkUfb\">\u9ad8\u6821\u5165\u8a66 \u5206\u89e3\u554f\u984c\u96c6 \u7406\u79d1<\/a>\u300f\uff08\u5b66\u7814\uff09\u2026\u96e3\u3057\u3044\u554f\u984c\u3082\u5c0f\u3055\u306a\u554f\u984c\u306b\u5206\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u3092\u89e3\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u3093\u306a\u5206\u89e3\u306e\u6280\u8853\u304c\u8eab\u306b\u3064\u304f\u3088\u3046\u306b\u6df1\u304f\u95a2\u308f\u308a\u3092\u6301\u3063\u3066\u4f5c\u308a\u307e\u3057\u305f\u3002<br \/><img class=\"alignnone  wp-image-64694 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-06-20-18.25.27.jpeg\" alt=\"\" width=\"197\" height=\"275\" \/><\/li>\r\n<li>\u300e\u5927\u4eba\u306e\u305f\u3081\u306e\u9ad8\u6821\u7269\u7406\u5fa9\u7fd2\u5e33\u300f\uff08\u8b1b\u8ac7\u793e\uff09\u2026\u4e00\u822c\u5411\u3051\u306b\u65e5\u5e38\u306e\u7269\u7406\u306b\u3064\u3044\u3066\u516c\u5f0f\u3092\u5143\u306b\u7d10\u89e3\u304d\u307e\u3057\u305f\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=1827\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u3067\u306f\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<strong>\u203b\u5897\u5237\u304c\u304b\u304b\u308a\uff16\u5237\u3068\u306a\u308a\u307e\u3057\u305f\uff082026\/02\/01\uff09<br \/><img class=\"alignnone wp-image-10940 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg\" sizes=\"(max-width: 220px) 100vw, 220px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg 311w\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-07-05 0.43.51\" width=\"220\" height=\"192\" \/><br \/><\/strong><\/li>\r\n<li>\u300e\u304d\u3081\u308b!\u5171\u901a\u30c6\u30b9\u30c8 \u7269\u7406\u57fa\u790e \u6539\u8a02\u7248\u300f\uff08\u5b66\u7814\uff09\u2026\u3000\u9ad8\u6821\u7269\u7406\u306e\u53c2\u8003\u66f8\u3067\u3059\u3002\u30a4\u30e9\u30b9\u30c8\u3092\u591a\u304f\u3057\u3066\u30a4\u30e1\u30fc\u30b8\u304c\u6301\u3066\u308b\u3088\u3046\u306b\u63cf\u304d\u307e\u3057\u305f\u3002\u6388\u696d\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3001\u7269\u7406\u304c\u82e6\u624b\u3001\u305d\u3093\u306a\u751f\u5f92\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=45322\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u306f\u3053\u3061\u3089\u3002<br \/><img class=\"alignnone wp-image-45718 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg\" sizes=\"(max-width: 184px) 100vw, 184px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg 756w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c-300x269.jpg 300w\" alt=\"\" width=\"184\" height=\"165\" \/><\/li>\r\n<\/ul>\r\n<h3><span style=\"text-align: center;\">\u5404\u7a2eSNS\uff08\u66f4\u65b0\u60c5\u5831\u3092\u304a\u5c4a\u3051\uff01\uff09<\/span><\/h3>\r\n<p style=\"text-align: center;\">\u3010\u65e5\u672c\u8a9e\u3011<a style=\"text-align: center;\" href=\"https:\/\/twitter.com\/kuwako\">X(Twitter)<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.instagram.com\/science_seeds\/\">instagram<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.facebook.com\/kuwakolab\/\">Facebook<\/a>\u3000\u3010\u82f1\u8a9e\u3011<a style=\"text-align: center;\" href=\"https:\/\/bsky.app\/profile\/kagakunoneta.bsky.social\">BlueSky<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.threads.net\/@science_seeds?hl=ja\">Threads<\/a><\/p>\r\n<h3 style=\"text-align: center;\"><strong>Explore<\/strong><\/h3>\r\n<ul>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=30764\">\u697d\u3057\u3044\u5b9f\u9a13<\/a>\u2026\u304a\u5b50\u3055\u3093\u3068\u4e00\u7dd2\u306b\u5922\u4e2d\u306b\u306a\u308c\u308b\u30a4\u30c1\u30aa\u30b7\u306e\u79d1\u5b66\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u9ad8\u6821\u7269\u7406\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306e\u52d5\u753b\u6559\u6750\u3082\u7528\u610f\u3057\u307e\u3057\u305f\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=798\">\u7406\u79d1\u306e\u6559\u6750<\/a>\u2026 \u7406\u79d1\u6559\u5e2b\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\uff01\u6388\u696d\u306e\u8cea\u3092\u9ad8\u3081\u3001\u6e96\u5099\u3092\u52b9\u7387\u5316\u3059\u308b\u305f\u3081\u306e\u9078\u308a\u3059\u3050\u308a\u306e\u6559\u6750\u3092\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/www.youtube.com\/c\/kkuwako\">Youtube<\/a>\u2026\u79d1\u5b66\u5b9f\u9a13\u7b49\u306e\u52d5\u753b\u3092\u914d\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/music.youtube.com\/playlist?list=PLoK4ZvKN9S2NgpYIochcQs0aL-vrRB_Qw\">\u79d1\u5b66\u30e9\u30b8\u30aa<\/a>\u00a0\u2026\u79d1\u5b66\u30c8\u30d4\u30c3\u30af\u3092\u307b\u307c\u6bce\u65e5\u914d\u4fe1\u4e2d\uff01AI\u6280\u8853\u3092\u99c6\u4f7f\u3057\u3066\u4f5c\u6210\u3057\u305f\u300c\u8033\u3067\u697d\u3057\u3080\u79d1\u5b66\u300d\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002<\/li>\r\n<li><a href=\"http:\/\/phys-edu.net\/wp\/?page_id=20940\">\u8b1b\u6f14<\/a>\u00a0\u2026\u5168\u56fd\u5404\u5730\u3067\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u30fb\u30b5\u30a4\u30a8\u30f3\u30b9\u30b7\u30e7\u30fc\u7b49\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"http:\/\/phys-edu.net\/wp\/?page_id=37\">About<\/a>\u00a0\u2026\u300c\u79d1\u5b66\u306e\u30cd\u30bf\u5e33\u300d\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3084\u3001\u904b\u55b6\u8005\u3067\u3042\u308b\u6851\u5b50\u7814\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u30fb\u60f3\u3044\u3092\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/li>\r\n<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a>\u00a0\u2026\u5b9f\u9a13\u6559\u5ba4\u306e\u3054\u4f9d\u983c\u3001\u57f7\u7b46\u30fb\u8b1b\u6f14\u306e\u76f8\u8ac7\u3001\u79d1\u5b66\u76e3\u4fee\u7b49\u306f\u3053\u3061\u3089\u306e\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044\u3002<\/li>\r\n<\/ul>\r\n<p>&nbsp;<\/p>\r\n<ul class=\"wp-block-latest-posts__list is-grid columns-3 has-dates wp-block-latest-posts\"><li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=65185&#038;lang=es\" aria-label=\"La m\u00e1gica turbidez blanca nacida de la &#8220;neutralizaci\u00f3n&#8221;: la sorprendente reacci\u00f3n qu\u00edmica entre el agua de cal y el di\u00f3xido de carbono\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/477aaef83dfd29e76ab5961b2920032c-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=65185&#038;lang=es\">La m\u00e1gica turbidez blanca nacida de la &#8220;neutralizaci\u00f3n&#8221;: la sorprendente reacci\u00f3n qu\u00edmica entre el agua de cal y el di\u00f3xido de carbono<\/a><time datetime=\"2026-07-06T06:34:54+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67086\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=65183&#038;lang=fi\" aria-label=\"&#8220;Neutraloinnin&#8221; synnytt\u00e4m\u00e4 taianomainen valkoinen sameus: Kalkkiveden ja hiilidioksidin yll\u00e4tt\u00e4v\u00e4 kemiallinen reaktio\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/477aaef83dfd29e76ab5961b2920032c-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=65183&#038;lang=fi\">&#8220;Neutraloinnin&#8221; synnytt\u00e4m\u00e4 taianomainen valkoinen sameus: Kalkkiveden ja hiilidioksidin yll\u00e4tt\u00e4v\u00e4 kemiallinen reaktio<\/a><time datetime=\"2026-07-06T06:34:29+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67086\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=65181&#038;lang=hi\" aria-label=\"&#8220;\u0909\u0926\u093e\u0938\u0940\u0928\u0940\u0915\u0930\u0923&#8221; \u0938\u0947 \u091c\u0928\u094d\u092e\u093e \u091c\u093e\u0926\u0941\u0908 \u0938\u092b\u0947\u0926 \u0927\u0941\u0902\u0927\u0932\u093e\u092a\u0928: \u091a\u0942\u0928\u0947 \u0915\u0947 \u092a\u093e\u0928\u0940 \u0914\u0930 \u0915\u093e\u0930\u094d\u092c\u0928 \u0921\u093e\u0907\u0911\u0915\u094d\u0938\u093e\u0907\u0921 \u0915\u0940 \u0905\u0928\u094b\u0916\u0940 \u0930\u093e\u0938\u093e\u092f\u0928\u093f\u0915 \u092a\u094d\u0930\u0924\u093f\u0915\u094d\u0930\u093f\u092f\u093e\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/477aaef83dfd29e76ab5961b2920032c-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=65181&#038;lang=hi\">&#8220;\u0909\u0926\u093e\u0938\u0940\u0928\u0940\u0915\u0930\u0923&#8221; \u0938\u0947 \u091c\u0928\u094d\u092e\u093e \u091c\u093e\u0926\u0941\u0908 \u0938\u092b\u0947\u0926 \u0927\u0941\u0902\u0927\u0932\u093e\u092a\u0928: \u091a\u0942\u0928\u0947 \u0915\u0947 \u092a\u093e\u0928\u0940 \u0914\u0930 \u0915\u093e\u0930\u094d\u092c\u0928 \u0921\u093e\u0907\u0911\u0915\u094d\u0938\u093e\u0907\u0921 \u0915\u0940 \u0905\u0928\u094b\u0916\u0940 \u0930\u093e\u0938\u093e\u092f\u0928\u093f\u0915 \u092a\u094d\u0930\u0924\u093f\u0915\u094d\u0930\u093f\u092f\u093e<\/a><time datetime=\"2026-07-06T06:33:53+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67086\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=65179&#038;lang=zh\" aria-label=\"\u300c\u4e2d\u548c\u300d\u8a95\u751f\u7684\u9b54\u6cd5\u767d\u6fc1\u2014\u2014\u77f3\u7070\u6c34\u8207\u4e8c\u6c27\u5316\u78b3\u610f\u60f3\u4e0d\u5230\u7684\u5316\u5b78\u53cd\u61c9\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/477aaef83dfd29e76ab5961b2920032c-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=65179&#038;lang=zh\">\u300c\u4e2d\u548c\u300d\u8a95\u751f\u7684\u9b54\u6cd5\u767d\u6fc1\u2014\u2014\u77f3\u7070\u6c34\u8207\u4e8c\u6c27\u5316\u78b3\u610f\u60f3\u4e0d\u5230\u7684\u5316\u5b78\u53cd\u61c9<\/a><time datetime=\"2026-07-06T06:33:13+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67086\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=65177&#038;lang=ko\" aria-label=\"&#8216;\uc911\ud654&#8217;\uac00 \ub9cc\ub4e0 \ub9c8\ubc95\uc758 \ubfcc\uc5f0 \ube5b\uae54, \uc11d\ud68c\uc218\uc640 \uc774\uc0b0\ud654\ud0c4\uc18c\uc758 \uc758\uc678\uc758 \ud654\ud559 \ubc18\uc751\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/477aaef83dfd29e76ab5961b2920032c-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=65177&#038;lang=ko\">&#8216;\uc911\ud654&#8217;\uac00 \ub9cc\ub4e0 \ub9c8\ubc95\uc758 \ubfcc\uc5f0 \ube5b\uae54, \uc11d\ud68c\uc218\uc640 \uc774\uc0b0\ud654\ud0c4\uc18c\uc758 \uc758\uc678\uc758 \ud654\ud559 \ubc18\uc751<\/a><time datetime=\"2026-07-06T06:32:33+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67086\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=65175&#038;lang=en\" aria-label=\"The Magical White Cloud Born from &#8220;Neutralization&#8221;: The Surprising Chemistry Between Limewater and Carbon Dioxide\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2021\/08\/477aaef83dfd29e76ab5961b2920032c-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=65175&#038;lang=en\">The Magical White Cloud Born from &#8220;Neutralization&#8221;: The Surprising Chemistry Between Limewater and Carbon Dioxide<\/a><time datetime=\"2026-07-06T06:32:01+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67086\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=26688\" aria-label=\"\u683c\u5b89\u5149\u6e90\u306b\uff11\u5de5\u592b\uff01\u300c\u5c48\u6298\u7387\u300d\u3068\u300c\u81e8\u754c\u89d2\u300d\u306e\u5b9f\u9a13\u3092\u884c\u3046\uff11\u3064\u306e\u30b3\u30c4\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2017\/01\/3fc0a7c082f595c35cb6a6a134023982-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=26688\">\u683c\u5b89\u5149\u6e90\u306b\uff11\u5de5\u592b\uff01\u300c\u5c48\u6298\u7387\u300d\u3068\u300c\u81e8\u754c\u89d2\u300d\u306e\u5b9f\u9a13\u3092\u884c\u3046\uff11\u3064\u306e\u30b3\u30c4<\/a><time datetime=\"2026-07-06T04:10:22+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67086\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=64887\" aria-label=\"\u300e\u9019\u3044\u56de\u308b\u63a2\u7a76\u300f\u3063\u3066\u77e5\u3063\u3066\u307e\u3059\u304b\uff1f\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-06-27-6.21.06-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=64887\">\u300e\u9019\u3044\u56de\u308b\u63a2\u7a76\u300f\u3063\u3066\u77e5\u3063\u3066\u307e\u3059\u304b\uff1f<\/a><time datetime=\"2026-07-05T06:22:43+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67085\u65e5<\/time><\/li>\n<li><div class=\"wp-block-latest-posts__featured-image\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=65146&#038;lang=fi\" aria-label=\"\u00c4mp\u00e4rist\u00e4 ja putkesta tiedelabra! \u00c4\u00e4nen aallonpituuden mittaaminen \u00e4lypuhelimella (ilmapatsaan resonanssikoe)\"><img width=\"150\" height=\"150\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5-150x150.jpg\" class=\"attachment-thumbnail size-thumbnail wp-post-image\" alt=\"\" style=\"\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5-150x150.jpg 150w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5-100x100.jpg 100w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5-110x110.jpg 110w\" sizes=\"(max-width: 150px) 100vw, 150px\" \/><\/a><\/div><a class=\"wp-block-latest-posts__post-title\" href=\"https:\/\/phys-edu.net\/wp\/?p=65146&#038;lang=fi\">\u00c4mp\u00e4rist\u00e4 ja putkesta tiedelabra! \u00c4\u00e4nen aallonpituuden mittaaminen \u00e4lypuhelimella (ilmapatsaan resonanssikoe)<\/a><time datetime=\"2026-07-05T05:40:44+09:00\" class=\"wp-block-latest-posts__post-date\">2026\u5e747\u67085\u65e5<\/time><\/li>\n<\/ul>\r\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Tiedekouluttaja Ken Kuwako t\u00e4\u00e4ll\u00e4. Joka p\u00e4iv\u00e4 on koep\u00e4iv\u00e4. T\u00e4ll\u00e4 kertaa esittelen kokeen, jossa tutkitaan \u00e4\u00e4ne [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":22799,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","sns_share_botton_hide":"","vkExUnit_sns_title":"","vkexunit_cta_each_option":"","_lightning_design_setting":{"layout":"default"},"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1630],"tags":[],"class_list":["post-65146","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category--fi"],"jetpack_featured_media_url":"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2015\/09\/38ccc9c14adf9de24ef878e1045ca5d5.jpg","jetpack-related-posts":[{"id":57233,"url":"https:\/\/phys-edu.net\/wp\/?p=57233&lang=fi","url_meta":{"origin":65146,"position":0},"title":"N\u00e4e n\u00e4kym\u00e4tt\u00f6m\u00e4t \u201c\u00e4\u00e4nen muodot\u201d! 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