[tex]dane:\\m = 2 \ kg\\\Delta T = 5^{o}C\\c = 4200\frac{J}{kg\cdot^{o}C}\\szukane:\\Q = ?\\\\Q = c\cdot m\cdot \Delta T\\\\Q = 4200\frac{J}{kg\cdot^{o}C}\cdot2 \ kg \cdot5^{o}C\\\\Q = 42 \ 000 \ J = 42 \ kJ[/tex]
