(1)水的质量M=V*p=100kg,Q=(50-20)*100*4.2×10^3=12600000J
(2)Q=W=Pt,t=Q/P=8400s=140min=2.33h
(3)W=PT=1500*(3600*3)=16200000J,效率为:126/162=77.78%
(4)低碳环保
(1)水的质量M=V*p=100kg,Q=(50-20)*100*4.2×10^3=12600000J
(2)Q=W=Pt,t=Q/P=8400s=140min=2.33h
(3)W=PT=1500*(3600*3)=16200000J,效率为:126/162=77.78%
(4)低碳环保