1. A 1000-W iron is left on the iron board with its base exposed to the air at 20°C. The convection heat transfer coefficient between the base surface and the surrounding air is 35 W/m². °C. If the base has an emissivity of 0.6 and a surface area of 0.02 m², determine the temperature of the base of the iron.2. The inner and outer surfaces of a 5-m x 6-m brick wall of thickness 30 cm and thermal conductivity 0.69 W/m °C are maintained at temperatures of 20°C and 5°C, respectively. Determine the rate of heat transfer through the wall, in W. 1. A 1000-W iron is left on the iron board with its base exposed to theair at 20°C. The convection heat transfer coefficient between thebase surface and the surrounding air is 35 W/m2 · °C. If the base hasan emissivity of 0.6 and a surface area of 0.02 m2, determine thetemperature of the base of the iron. 2. The inner and outer surfaces of a 5-m x 6-m brick wall of thickness30 cm and thermal conductivity 0.69 W/m · °C are maintained attemperatures of 20°C and 5°C, respectively. Determine the rate ofheat transfer through the wall, in W.

Answered: 1. A 1000-W iron is left on the iron…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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1. A 1000-W iron is left on the iron board with its base exposed to the air at 20°C. The convection heat transfer coefficient between the base surface and the surrounding air is 35 W/m². °C. If the base has an emissivity of 0.6 and a surface area of 0.02 m², determine the temperature of the base of the iron.

2. The inner and outer surfaces of a 5-m x 6-m brick wall of thickness 30 cm and thermal conductivity 0.69 W/m °C are maintained at temperatures of 20°C and 5°C, respectively. Determine the rate of heat transfer through the wall, in W.

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