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Thread: Zanimljivosti iz nauke

  1. #951
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    ^Zašto neutroni trebaju da uspore da bi podijelio atom Uranijuma?
    It was a business doing pleasure with you

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    Quote Originally Posted by gString View Post
    ^Zašto neutroni trebaju da uspore da bi podijelio atom Uranijuma?
    To je zbog toga što brzi neutroni imaju preveliku energiju da se uspiješno uglave u nukleus urana i predaju potrebnu energiju da dođe do cijepanja atoma već se odbijaju i ubrzo dolazi do raspršivanja i gubitka tih neutrona van komada uranijuma.

    Predstavi sebi rupu za golf (kao nukleus urana) a neutron kao golf lopticu koja se nalazi blizu rupe. Ako je prejako udariš, loptica samo odskoči od rubova rupe pa je zato moraš udariti slabije da se kreće dovoljno sporo da upadne u rupu.



    Neutroni koji se oslobađaju iz jezgre imaju preveliku energiju (jer fuzija oslobađa energiju, zato i želiš nuklearni reaktor) pa odskaču od ostalih nukleusa i treba ih usporiti dovoljno da se mogu nanovo ugnjezditi u novim jezgrima izazivajući nestabilnost i fuziju.

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    Postrojenje za preradu kanalizacionih voda u čistu pijaću vodu.


    ------------------------------------------------------------------

    Inače, 2015.....
    Where is my FLYING CAR???

    Last edited by ASC; 16-01-15 at 00:11.

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    TED talks daleke 1984 godine!!!





    -----------------------------------------------------------------------------------------------------------------------------------------------

    Naknadno dodato:

    First contracting human muscle grown in laboratory

    http://phys.org/news/2015-01-human-m...atory.html#jCp

    Last edited by funestis; 23-01-15 at 20:18.

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    Dešifrovanje svitaka izgorelih tokom erupcije Vezuva iz Herkulanuma upotrebom X-zraka.

    http://www.smithsonianmag.com/histor...953950/?no-ist




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    Last edited by clapton; 25-01-15 at 23:29.

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    Da, samo što ima jedan mali problem:
    http://m.naturalnews.com/news/046656...er_Brazil.html

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    It was a business doing pleasure with you

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    @gstring
    odlican klip!
    istrajan budi.

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    Qq greote od male, koliko joj je trebalo da ovo nauci, ali bolje i ovo nego princeze i dijademe
    Nisam znao da smo zvanicno stigli do 118, ili sam zaboravio.

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