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pomoc Priklad Ze Zel


DooM

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Hojte mam za ukol vypocitat priklad s rychlovarnou konvici a absolutne nevim jak na to...

 

U = 220 V, P2 = 600W, (takove divne pismeno :d,myslim ze to je otepleni nebo co.. ale teta to neni..) = 0.8, t = 5 min, c = 3kč/1kWh, m = 0.7 l, (teta s indexem toho divneho pismenka (mozna otepleni)) = 15°C, tv,Cv = ?

 

Pochybuju ze by to nekdo tady dokazal spocitat,ale zkusil jsem to no :d

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Nemáš v sešitě vzorečky nebo co?

nemam .. ucitel nam proste vzdy zada nejakej nemozne tezkej priklad a rekne "Zjistete jak se to pocita" :d.

Dosud jsem jakztakz vedel.. s timhle si fakt nevim rady :d

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