1item 1 item 1 1.25 points circular ceramic plate that can be modeled as a blackbody is being heated by an electrical heater. the plate is 30 cm in diameter and is situated in a surrounding ambient temperature of 15°c where the natural convection heat transfer coefficient is 12 w/m2·k. if the efficiency of the electrical heater to transfer heat to the plate is 80%, determine the electric power that the heater needs to keep the surface temperature of the plate at 180°c
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