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another one 20.29 An electric light bulb rated at 60 W has a surface temperature of 145C when cooled by atmospheric air at 25 C.

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20.29 An electric light bulb rated at 60 W has a surface temperature of 145C when cooled by atmospheric air at 25 C. The air flows past the bulb with a velocity of 0.5 m/s. The bulb can be modeled as a sphere with a diameter of 7.5 2. Determine the heat transfer from the bulb by the mechanism of forced convection. a M

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