A laboratory oven has a cubical interior chamber 1 m on a side with interior surfaces that are of emissivity = 0.85. Draw the

A laboratory oven has a cubical interior chamber 1 m on a side with interior surfaces that are of emissivity ε = 0.85. Draw the thermal network. Determine the initial rate of radiation heat transfer to the laboratory in which the oven is placed when the oven door is opened. The oven and surroundings temperatures are To = 375°C and Tsur = 20°C, respectively. Treat the oven door as one surface and the remaining five interior furnace walls as another