A baker has developed a marvelous cookie recipe that works best if the cookie is cooled in a vacuum chamber through radiation heat transfer alone. The cookie is placed inside the chamber with a surface temperature of 125°C. Assume that the cookie is thin enough that the temperature is uniform throughout during the cooling process. The walls of the chamber are maintained at 10.0°C. If the surface area of the cookie is 0.005 m2 and if the emissivity of the cookie is 0.80, determine the initial radiation heat transfer rate from the cookie to the walls of the chamber.
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