An Object Having a Fixed Emissivity of 0

question 224

Multiple Choice

An object having a fixed emissivity of 0.725 radiates heat at a rate of 10 W when it is at an absolute temperature T. If its temperature is doubled to 2T, at what rate will it now radiate?

• A) 80 W
• B) 160 W
• C) 320 W
• D) 40 W
• E) 20 W

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