A vertical duct is filled with a metal of melting point T m = 1500 K. The lower end is at 1800 K and the upper end at 1200 K. The conductivity of the liquid metal is 1.5 times that of the solid. Wha

Question

A vertical duct is filled with a metal of melting point T m ​ = 1500 K. The lower end is at 1800 K and the upper end at 1200 K. The conductivity of the liquid metal is 1.5 times that of the solid. What fraction of the duct is molten?

TestHub · Accepted Answer

l l 1 ​ ​ = k ( T 1 ​ − T m ​ ) + ( T m ​ − T 2 ​ ) k ( T 1 ​ − T m ​ ) ​ = 1.5 × 300 + 300 1.5 × 300 ​ = 0.60 .

Physics - Heat & Thermo Question with Solution | TestHub

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