m1=5 кг c1=380 Дж/(кг*С) m2=3 кг c2=4200 Дж/(кг*С) Δt=80° q=43.5*10^6 Дж/кг η=0.4 (40%) m3=?
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η=(Q1+Q2)/Q3
Q1=c1*m1*Δt
Q2=c2*m2*Δt
Q3=q*m3
m3=Δt*(c1*m1+c2*m2)/(η*q)=80*(380*5+4200*3)/(0.4*43.5*10^6)≈0.067 кг (67 г)
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m1=5 кг c1=380 Дж/(кг*С) m2=3 кг c2=4200 Дж/(кг*С) Δt=80° q=43.5*10^6 Дж/кг η=0.4 (40%) m3=?
===
η=(Q1+Q2)/Q3
Q1=c1*m1*Δt
Q2=c2*m2*Δt
Q3=q*m3
m3=Δt*(c1*m1+c2*m2)/(η*q)=80*(380*5+4200*3)/(0.4*43.5*10^6)≈0.067 кг (67 г)
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