An Object Having a Fixed Emissivity of 0

question 102

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

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Definitions:

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