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Vypočítajte Ek valca s polomerom 10cm a hmotnosťou 2kg v čase 5s, jeho uhlové zržchlenie je konštantné 8/pí. V čase t=0 je toto teleso v pokoji. Moment zotrvačnosti valca je I=1/2 m*r(r je na druhú).
Elektródy rovinného kondenzátora s plochou S sú vo vzájomnej vzdialenosti d ( d<< S ). Medzi elektódami kondenzátora je dielektrikum s relatívnou permitivitou r a kondenzátor je pripojený…
Elektródy guľového kondenzátora pozostávajú z dvoch sústredných guľových vodičov s polomermi R1 a R2 (R1 <R2). Dielektrikum medzi elektródami má relatívnu permitivitu r a elektródy…
Určite teplo Q, ktoré prijalo pevné teleso pri výmene tepla ak sa pritom jeho energia zväčšila o 300 J. A ešte: teleso zo železa odovzdalo teplo 270 kj, jeho teplota klesla o 200°C. Vypočitajte jeho…
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