One end of a 25 cm rod is held at 600 K. The other end is blackened, radiates to surroundings at 300 K, and settles at 550 K in steady state. No heat is lost from the sides. Find the thermal conductiv

Question

One end of a 25 cm rod is held at 600 K. The other end is blackened, radiates to surroundings at 300 K, and settles at 550 K in steady state. No heat is lost from the sides. Find the thermal conductivity of the rod, in W m⁻¹ K⁻¹.

TestHub · Accepted Answer

0.25 k ( 600 − 550 ) ​ = σ ( 55 0 4 − 30 0 4 ) , so k = 50 5.67 × 1 0 − 8 × ( 55 0 4 − 30 0 4 ) × 0.25 ​ = 23.6 .

Physics - Heat & Thermo Question with Solution | TestHub

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