A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is maintained at 200°C, while it dissipates heat by convectlon, with h= 150 W/m.K into an ambient at 25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod decrease or increase?
A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is maintained at 200°C, while it dissipates heat by convectlon, with h= 150 W/m.K into an ambient at 25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod decrease or increase?
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter3: Transient Heat Conduction
Section: Chapter Questions
Problem 3.6P: A 0.6-cm diameter mild steel rod at 38C is suddenly immersed in a liquid at 93C with hc=110W/m2K....
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![A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is
maintained at 200°C, while it dissipates heat by convection, with h= 150 W/m?.K into an ambient at
25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod
decrease or increase?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3eeefe74-8155-4712-af3e-fa1ce92e7d96%2F23b9dfd5-1caf-40e8-894e-defdfea2948b%2F5urkp7k_processed.png&w=3840&q=75)
Transcribed Image Text:A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is
maintained at 200°C, while it dissipates heat by convection, with h= 150 W/m?.K into an ambient at
25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod
decrease or increase?
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