Question: A spherical ball 6 cm in diameter and 3 1 0 Kis placed inside a large spherical furnaceat 6 0 0 K . Estimate the

A spherical ball

6

cm in diameter and

310

Kis placed inside a large spherical furnaceat

600

.

Estimate the diameter of the spherical furmace such that

20 %

of the energy emitted by the furnace reaches the spherical ball. Assume the surfaces as black. WVhatis the net exchange of energy between the surfaces?

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