\(Q_{thu}=mc\Delta t=2\cdot4200\cdot75=630000\left(J\right)\)\(H=\dfrac{Q_{thu}}{Q_{toa}}100\%\Rightarrow Q_{toa}=\dfrac{Q_{thu}}{H}100\%=\dfrac{630000}{80}100\%=787500\left(J\right)\)\(A=Pt=1100\cdot2\cdot30=66000\)Wh = 66kWh\(\Rightarrow T=A\cdot1000=66\cdot1000=66000\left(dong\right)\)Câu trả lời: \(Q_{thu}=mc\Delta t=2\cdot4200\cdot75=630000\left(J\right)\)\(H=\dfrac{Q_{thu}}{Q_{toa}}100\%\Rightarrow Q_{toa}=\dfrac{Q_{thu}}{H}100\%=\dfrac{630000}{80}100\%=787500\left(J\right)\)\(A=Pt=1100\cdot2\cdot30=66000\)Wh = 66kWh\(\Rightarrow T=A\cdot1000=66\cdot1000=66000\left(dong\right)\)