Żelazko o mocy 2.4kW było używane przez 3 minuty. Ile energii pobrało w tym czasie? Wynik podaj w J i kWh. Zapisz WSZYSTKIE obliczenia
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![Dane:\\P = 2,4 kW = 2400 W \\t = 3 min = 0,05 h = 180s \\\\Szukane :\\E = ?\\\\rozwiazanie :\\P = \frac{W}{t}\\W = P\cdot t \\\\W = 2,4[kWh] \cdot 0,05[h] = 0,12[kWh]\\\\W = 2400 [W] \cdot 180[s] = 432000 J = 432[kJ]](https://tex.z-dn.net/?f=Dane%3A%5C%5CP+%3D+2%2C4+kW+%3D+2400+W+%5C%5Ct+%3D+3+min+%3D+0%2C05+h+%3D+180s+%5C%5C%5C%5CSzukane+%3A%5C%5CE+%3D+%3F%5C%5C%5C%5Crozwiazanie+%3A%5C%5CP+%3D++%5Cfrac%7BW%7D%7Bt%7D%5C%5CW+%3D+P%5Ccdot+t++%5C%5C%5C%5CW+%3D+2%2C4%5BkWh%5D+%5Ccdot+0%2C05%5Bh%5D+%3D+0%2C12%5BkWh%5D%5C%5C%5C%5CW+%3D+2400+%5BW%5D+%5Ccdot+180%5Bs%5D+%3D+432000+J+%3D+432%5BkJ%5D "Dane:\\P = 2,4 kW = 2400 W \\t = 3 min = 0,05 h = 180s \\\\Szukane :\\E = ?\\\\rozwiazanie :\\P = \frac{W}{t}\\W = P\cdot t \\\\W = 2,4[kWh] \cdot 0,05[h] = 0,12[kWh]\\\\W = 2400 [W] \cdot 180[s] = 432000 J = 432[kJ]")
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