Question: A sealed electronic box dissipating a total of 100 W of power is placed in a vacuum chamber. If this box is to be cooled

A sealed electronic box dissipating a total of 100 W of power is placed in a vacuum chamber. If this box is to be cooled by radiation alone and the outer surface temperature of the box is not to exceed 55(C, the temperature the surrounding surfaces must be kept is to be determined.
The emissivity of the outer surface of the box is given to be 0.95.

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