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A black body at 227°C radiates heat at the rate of 7 cal / cm/ s. At a temperature of 727°C, the rate of heat radiated in the same units will be:
  • a)
    50
  • b)
    112
  • c)
    80
  • d)
    60
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A black body at 227°C radiates heat at the rate of 7 cal / cm2/ s....
Given that:
The heat radiated at 227∘C, E1 = 7 cal / cm2 / s
Initial temperature of the body, T1 = 227∘C ⇒ (227 + 273) K = 500 K
Final temperature of the body, T2 =  727∘C ⇒ (727 + 273) K = 1000 K

 
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