A source S supplies heat at 60 W to a sink S ′ held at 20°C through two identical conductors in parallel, each 25 cm long, 2 cm² in cross-section and k = 400 W m⁻¹ K⁻¹. Find the temperature of S , in

Question

A source S supplies heat at 60 W to a sink S ′ held at 20°C through two identical conductors in parallel, each 25 cm long, 2 cm² in cross-section and k = 400 W m⁻¹ K⁻¹. Find the temperature of S , in °C.

TestHub · Accepted Answer

Each conductor: l k A ​ = 0.25 400 × 2 × 1 0 − 4 ​ = 0.32 W/K. Two in parallel: 0.64 W/K. Δ T = 0.64 60 ​ = 93.75 , so T S ​ = 113.75 ∘ C.

Physics - Heat & Thermo Question with Solution | TestHub

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