Šíření zvuku - fyzika 9 ZŠ
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13:52
Infrazvuk a ultrazvuk (IR a UV) - fyzika 9 ZŠ
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21:24
Zvuk - Ffyzika 9 ZŠ
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10:19
Rychlost zvuku a sonický třesk.
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10:03
Elektrik Motoru (DC Motor) Nasıl Çalışır?
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27:37
ALBERT EINSTEIN - Evrenin sırrını çözen adam (Biyografi Serisi #2)
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9:10
Radioaktivita – NEZkreslená věda II
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23:28
Jak na slovíčka v angličtině?
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19:32