the emissivity of tungsten is approximately 0.65.A tungsten sphere 1cm in radius is suspended within a large evacuated enclosure whose walls are 400K. what power input is required to maintain the sphere at a temperature of 3000K if heat condition along the support is neglected take σ=5.67×10⁻8.

Answer mechanical energy;

We have no idea what the graph shows, or why it may be accurate,  because we can't see the graph.on a different subject, choice ' d ' is the only true statement among the choices.

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