Odpowiedź :
[tex]dane:\\W = 240 \ kJ = 240 \ 000 \ J\\t = 2 \ min = 2\cdot60 \ s = 120 \ s\\szukane:\\P = ?\\\\P = \frac{W}{t}\\\\P = \frac{240000 \ J}{120 \ s}\\\\P = 2 \ 000 \ W = 2 \ kW[/tex]
[tex]dane:\\W = 240 \ kJ = 240 \ 000 \ J\\t = 2 \ min = 2\cdot60 \ s = 120 \ s\\szukane:\\P = ?\\\\P = \frac{W}{t}\\\\P = \frac{240000 \ J}{120 \ s}\\\\P = 2 \ 000 \ W = 2 \ kW[/tex]