(1)W=pt=UIt=U(q/t)*t=Uq=10^9V*16.8C=1.68*10^10J.
(2)Q=mC(T-T0)
m=Q/C(T-T0)
=W/C(T-T0)
=1.68*10^10J/4.2×10^3J/(kg·℃)(70℃-30℃)
=10^5kg
(3)清洁.方便.
(1)W=pt=UIt=U(q/t)*t=Uq=10^9V*16.8C=1.68*10^10J.
(2)Q=mC(T-T0)
m=Q/C(T-T0)
=W/C(T-T0)
=1.68*10^10J/4.2×10^3J/(kg·℃)(70℃-30℃)
=10^5kg
(3)清洁.方便.