A cube a=3.0cm on each side radiates energy at the rate of P=20J//s when its temperature is 727^(@)C and surrounding temperature 27^(@)C. Determine its emissivity.

A cube a=3.0cm on each side radiates energy at the rate of P=20J//s wh

1.	A cube a=3.0cm on each side radiates energy at the rate of P=20J//s when its temperature is 727^(@)C and surrounding temperature 27^(@)C. Determine its emissivity.
Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :`0.066`</body></html>