Question: A horizontal tube is maintained at a surface temperature of 55oC and exposed to atmospheric air at 27oC. Heat is supplied to the tube by

A horizontal tube is maintained at a surface temperature of 55oC and exposed to atmospheric air at 27oC. Heat is supplied to the tube by a suitable electric heater that produces an input of 175 W for each meter of length. Find the expected power input if the surface temperature is raised to 83oC.

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