A tungsten sphere (r = 1.41 cm) is needed to be maintained at 3314 K. The walls of the enclosure, where it is suspended within,

Question

A tungsten sphere (r = 1.41 cm) is needed to be maintained at 3314 K. The walls of the enclosure, where it is suspended
within, are at 251 K. Ignoring the heat conduction along the supports, calculate the needed power input. The emissivity of
tungsten is 0.350. Express your answer in kW.
Round your answer to 2 decimal places.

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