[tex]dane:\\P = 1 \ kW = 1000 \ W\\t = 5 \ min = 5\cdot60 \ s = 300 \ s\\szukane:\\W = ?\\\\Rozwiazanie\\\\P = \frac{W}{t} \ \ |\cdot t\\\\W = P\cdot t\\\\W = 1000 \ W\cdot300 \ s\\\\\underline{W = 300 \ 000 \ J = 300 \ kJ}\\\\(1 \ kJ = 1000 J)[/tex]
