A black body radiates 3 joule per square centimetre per second when its temperature is 12 7 ∘ C. How much heat will be radiated per square centimetre per second when its temperature is 52 7 ∘ C?

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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

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A black body radiates 3 joule per square centimetre per second when its temperature is $12 7^{\circ}$ C. How much heat will be radiated per square centimetre per second when its temperature is $52 7^{\circ}$ C?

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Answer:

Solution:

$T$ changes from 400 K to 800 K, a factor 2, so the power rises by $2^{4} = 16$ . $3 \times 16 = 48$ J. D.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

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