n electric iron is switched on and left on the ironing board. The base of the iron has a surface area of 0.02 m2, and is exposed to air at 200 oC through a heat transfer coefficient of 30 W/m2 K. Its emissivity of 0.5 and the temperature is 6740 oC. Will the power rating of the iron be (i) < 1 kW, (ii) > 1 kW, (iii) = 1 kW?

n electric iron is switched on and left on the ironing board. The base of the iron has a surface area of 0.02 m2, and is exposed to air at 200 oC through a heat transfer coefficient of 30 W/m2 K. Its emissivity of 0.5 and the temperature is 6740 oC. Will the power rating of the iron be (i) < 1 kW, (ii) > 1 kW, (iii) = 1 kW?

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.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.33P

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