September 2018 2 22 Report

oblicz ile zaplacisz za tygodniowe uzywanie urzadzen elektrychnych w moim pokoju

prostownica: A=20 min=1/3h P=2800W=2,8 kw E=28/10*1/3 kwh E= 2,8*0,3kwh E=0,84 kwh*0,9zl/kwh=

wiertarka: P=500 W=o,5 kw A=1/2h E=o,5 kwh*1/2h=1kwh Cena 1kwh*0,9 zl/kwh=0,9 zl


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