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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediumnumerical

A surface of area 0.04 $m^{2}$ and emissivity 0.6 is at 500 K. Find the power it radiates in watts (two decimals; $σ = 5.67 \times 1 0^{- 8}$ W $m^{- 2}$ $K^{- 4}$ ).

Answer:

85.05

Solution:

$P = e σ A T^{4} = 0.6 \times 5.67 \times 1 0^{- 8} \times 0.04 \times 50 0^{4} = 85.05$ W. It depends on the surface (through $e$ ), the area and the temperature.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

⏱ 2m

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