[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.mkdcb.cz\/vedecke-pokusy-z-pohodli-domova\/#Article","mainEntityOfPage":"https:\/\/www.mkdcb.cz\/vedecke-pokusy-z-pohodli-domova\/","headline":"V\u011bdeck\u00e9 pokusy z pohodl\u00ed domova","name":"V\u011bdeck\u00e9 pokusy z pohodl\u00ed domova","description":"L\u00e9to je tady, sv\u00e9 ratolesti m\u00e1te doma a cht\u011bli byste s nimi str\u00e1vit p\u00e1r chvil d\u011bl\u00e1n\u00edm n\u011b\u010deho, co bude p\u0159\u00ednosem pro v\u00e1s oba nebo zkr\u00e1tka jen hled\u00e1te z\u00e1bavu pro v\u00e1s a va\u0161e p\u0159\u00e1tele? K l\u00e9tu nepat\u0159\u00ed jen slunce a koup\u00e1n\u00ed, ale i v\u011bda! Nepot\u0159ebujete \u017e\u00e1dn\u00e9 speci\u00e1ln\u00ed vybaven\u00ed, u\u017eit\u00ed ochrann\u00fdch \u010di alespo\u0148 slune\u010dn\u00edch br\u00fdl\u00ed nen\u00ed nutn\u00e9. […]","datePublished":"2025-03-01","dateModified":"2023-04-29","author":{"@type":"Person","@id":"https:\/\/www.mkdcb.cz\/author\/#Person","name":"mkdcb.cz\n","url":"https:\/\/www.mkdcb.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/f7320ca526354d2794ceb75173050bfa147af8617816df401a16569341b5fbaf?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/f7320ca526354d2794ceb75173050bfa147af8617816df401a16569341b5fbaf?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"mkdcb.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.mkdcb.cz\/wp-content\/uploads\/img_a289821_w2052_t1501322566.jpg","url":"https:\/\/www.mkdcb.cz\/wp-content\/uploads\/img_a289821_w2052_t1501322566.jpg","height":0,"width":0},"url":"https:\/\/www.mkdcb.cz\/vedecke-pokusy-z-pohodli-domova\/","about":["Z\u00e1bava"],"wordCount":484,"articleBody":"L\u00e9to je tady, sv\u00e9 ratolesti m\u00e1te doma a cht\u011bli byste s nimi str\u00e1vit p\u00e1r chvil d\u011bl\u00e1n\u00edm n\u011b\u010deho, co bude p\u0159\u00ednosem pro v\u00e1s oba nebo zkr\u00e1tka jen hled\u00e1te z\u00e1bavu pro v\u00e1s a va\u0161e p\u0159\u00e1tele? K l\u00e9tu nepat\u0159\u00ed jen slunce a koup\u00e1n\u00ed, ale i v\u011bda!Nepot\u0159ebujete \u017e\u00e1dn\u00e9 speci\u00e1ln\u00ed vybaven\u00ed, u\u017eit\u00ed ochrann\u00fdch \u010di alespo\u0148 slune\u010dn\u00edch br\u00fdl\u00ed nen\u00ed nutn\u00e9. Nezapome\u0148te si v\u0161ak po dokon\u010den\u00ed um\u00fdt ruce a n\u00e1sleduj\u00edc\u00ed aktivity prov\u00e1d\u011bjte v\u017edy pod dohledem dosp\u011bl\u00e9 osoby.Budete pot\u0159ebovat:\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ferrofluid (na internetu bez probl\u00e9m\u016f k sehn\u00e1n\u00ed)\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Permanentn\u00ed magnet (ze vz\u00e1cn\u00fdch zemin \u2013 extr\u00e9mn\u011b siln\u00e9 magnety obvykle vyroben\u00e9 z neodymia)\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Pap\u00edrov\u00e9 ut\u011brky a \u010dist\u00edc\u00ed prost\u0159edky\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Rukavice\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Tal\u00ed\u0159 nebo velkou omyvatelnou plochu jako podlo\u017eku\u00a0Postup:1.\u00a0\u00a0\u00a0\u00a0\u00a0 S nasazen\u00fdmi rukavicemi nalijte mal\u00e9 mno\u017estv\u00ed ferrofluidu na tal\u00ed\u0159 nebo na podlo\u017eku (nejlep\u0161\u00ed je pracovat na stole). Vyvarujte se ale d\u0159eva, l\u00e1tku u\u017e byste z n\u011bj nedostali.2.\u00a0\u00a0\u00a0\u00a0\u00a0 Permanentn\u00ed magnet um\u00edst\u011bte pod tal\u00ed\u0159 \u010di st\u016fl a sledujte, jak se d\u00e1 \u010dern\u00e1 tekutina do pohybu. Nabude nov\u00e9 je\u017ekovi-podobn\u00e9 formy, kdy se p\u0159\u00edmo nad magnetem objev\u00ed \u0161pi\u010dat\u00e9 bodlinky. Pohybujte j\u00edm pod tal\u00ed\u0159em \u010di stolem, nov\u011b p\u0159etvo\u0159en\u00e1 tekutina ho bude n\u00e1sledovat.3.\u00a0\u00a0\u00a0\u00a0\u00a0 Pokud ude\u0159\u00edte do stolu (jemn\u011b), bodlinky se za\u010dnou to\u010dit. Ferrofluid m\u016f\u017eete dokonce nechat plazit se po povrchu, a pokud v\u00e1m nevad\u00ed d\u011bl\u00e1n\u00ed nepo\u0159\u00e1dku, p\u0159ilo\u017ete magnet m\u00edrn\u011b nad tekutinu a sledujte, jak vzdoruje gravitaci postupn\u00fdm odkap\u00e1v\u00e1n\u00edm vzh\u016fru za magnetem. Ferrofluid se r\u00e1zem zm\u011bn\u00ed na zvl\u00e1\u0161tn\u00ed slizovitou \u010dernou kouli, kter\u00e1 p\u016fsob\u00ed jako vesm\u00edrn\u00fd vet\u0159elec.Co se vlastn\u011b pr\u00e1v\u011b stalo?Ferrofluid je olejovit\u00e1 tekut\u00e1 sm\u011bs s obsahem drobn\u00fdch \u010d\u00e1ste\u010dek kovu, zkombinovan\u00e1 s povrchov\u011b aktivn\u00ed l\u00e1tkou, kter\u00e1 zabra\u0148uje shlukov\u00e1n\u00ed t\u011bchto \u010d\u00e1stic. V p\u0159\u00edtomnosti magnetu se kovov\u00e9 \u010d\u00e1stice sna\u017e\u00ed zarovnat spolu s dr\u00e1hou magnetick\u00e9ho pole, proto vytv\u00e1\u0159\u00ed takov\u00e9 bizarn\u00ed tvary.Malou lahvi\u010dku ferrofluidu m\u016f\u017eete koupit na internetu za p\u00e1r korun (okolo 200,-K\u010d) nebo si ho dokonce vyrobit sami \u2013 sta\u010d\u00ed v hrne\u010dku sm\u00edchat \u010dernou barvu do laserov\u00e9 tisk\u00e1rny s mal\u00fdm mno\u017estv\u00edm oleje (sta\u010d\u00ed oby\u010dejn\u00fd, jak\u00fd u\u017e\u00edv\u00e1te k va\u0159en\u00ed). D\u00e1vejte pozor\u00a0 – ne v\u0161echny modern\u00ed laserov\u00e9 tisk\u00e1rny maj\u00ed\u00a0 magnetick\u00fd inkoust, proto ho vyu\u017eijte jen pokud si budete jisti. Jako ka\u017ed\u00fd \u010dern\u00fd inkoust, i ferrofluid v\u00e1m velice snadno vytvo\u0159\u00ed nezni\u010diteln\u00e9 skvrny, proto bu\u010fte opatrn\u00ed, kde s n\u00edm pracujete a zda m\u00e1te rukavice. Nebude od v\u011bci si k experimentu rad\u0161i po\u0159\u00eddit i z\u00e1st\u011bru.                                                                                                                                                                                                                                                                                                                                                                                        4\/5 - (13 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"V\u011bdeck\u00e9 pokusy z pohodl\u00ed domova","item":"https:\/\/www.mkdcb.cz\/vedecke-pokusy-z-pohodli-domova\/#breadcrumbitem"}]}]