Object a Has an Emissivity of 0

question 18

Multiple Choice

Object A has an emissivity of 0.95;and its temperature is 25 °C.At what temperature (in degrees Celsius) does object B,whose emissivity is 0.50,emit radiation at the same rate as object A if both objects have the same surface area?

• A)29 °C
• B)40 °C
• C)61 °C
• D)77 °C
• E)93 °C

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