An astronaut is at work in the service bay of a spacecraft and is surrounded by walls at -100oC. The outer surface area of the suit is 3m2. The suit has an emissivity of 0.05. Calculate the rate of heat loss when the suit’s outer temperature is 0oC How much food the astronaut has to eat to maintain the level of heat loss?

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.