Please solve both questions
Asked by Vidya
10th March 2018,
8:38 PM
Answered by Expert
Answer:
Radiation power loss = εAσ(T4 - Tc4) , where ε is emissivity of the surface, A is area of surface, σ is stefan-boltzman constant, T is the radiating body temperature in kelvin, Tc is temperature of surroundings in kelvin. We consider Radiation power loss is proportional to (T4 - Tc4).
In first case we take mean temperature 90ºC or 363 K and Radiation loss P1 is proportioanal to (3634-2934)
In second case we take mean temperature 70ºC or 343 K and Radiation loss P2 is proportioanal to (3434-2934)
Answered by Expert
10th March 2018,
11:03 PM
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