If a body coated black at 600K surrounded by atmosphere at 300 K has cooling rate r_(0), the same body at 900 K, surrounded by the same atmosphere, will have cooling rate equal to

If a body coated black at 600K surrounded by atmosphere at 300 K has c

1.	If a body coated black at 600K surrounded by atmosphere at 300 K has cooling rate r_(0), the same body at 900 K, surrounded by the same atmosphere, will have cooling rate equal to
Answer» <html><body><p>`16/3 r_(0)` <br/>`8/16 r_(0)` <br/>`16 r_(0)` <br/>`4 r_(0)` </p>Solution :Cooling <a href="https://interviewquestions.tuteehub.com/tag/rate-1177476" style="font-weight:bold;" target="_blank" title="Click to know more about RATE">RATE</a> `<a href="https://interviewquestions.tuteehub.com/tag/alpha-858274" style="font-weight:bold;" target="_blank" title="Click to know more about ALPHA">ALPHA</a> T^(4)-T_(0)^(4)` <br/> `r = {((<a href="https://interviewquestions.tuteehub.com/tag/900-341675" style="font-weight:bold;" target="_blank" title="Click to know more about 900">900</a>)^(4)-(300)^(4))/((600)^(4)-(300)^(4))}r_(0) = 16/3r_(0)`</body></html>