q=2.9*10^7
m1=0.2
m2=1000*0.03=30 кг
с=4200
q*m1=c*m2*Δt
Δt=q*m1/(c*m2)=2.9*10^7*0.2/(4200*30)=46 град
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q=2.9*10^7
m1=0.2
m2=1000*0.03=30 кг
с=4200
q*m1=c*m2*Δt
Δt=q*m1/(c*m2)=2.9*10^7*0.2/(4200*30)=46 град