Nie mam pojecia jak to zrobic -pomozecie dam naj PILNE

zad.1. m = 1,2 kg cw = 4200 J/kg * C ΔT = 91 C P = 3500 W t = ? W = Q [latex]P * t = m * c_w * Delta T[/latex] [latex]t = frac{m * c_w * Delta T }{P} [/latex] [latex]t = frac{1,2 kg * 1840 frac{J}{kg * C }* 91 C }{3500 frac{J}{s} } = 57,41 s[/latex] zad.2. m = 200 g = 0,2 kg Q = 750 J cw = 4200 J/kg * C ΔT = ? [latex]Q = m * c_w * Delta T /: m * c_w[/latex] [latex]Delta T = frac{750 J }{4200 frac{J}{kg * C } * 0,2 kg } = 0,89 C[/latex]