m1=1.5 кг t1=80 t=20 tc=37 m2=?
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c*m1*(t1-tc)=c*m2*(tc-t2)
m2=m1*(t1-tc)/(tc-t2)=1.5*(80-37)/(37-20)=3.8 кг
m1=1.5 кг t1=80 t=20 tc=37 m2=?
===
c*m1*(t1-tc)=c*m2*(tc-t2)
m2=m1*(t1-tc)/(tc-t2)=1.5*(80-37)/(37-20)=3.8 кг