A spherical pot of hot coffee contains 075l of liquid, Ask an Expert

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A spherical pot of hot coffee contains 0.75L of liquid (essentially water) at an initial temperature of 90 degree celsius. The pot has an emissivity of 0.60, and the surroundings are at a temperature of 20.0 degree celsius.

Calculate the coffee's rate of heat loss by radiation. (Express your answer to two significant figures and include the appropriate units.)

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