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Questions and Answers
Which of the following statements about emissivity is true?
Which of the following statements about emissivity is true?
- Objects with low emissivity emit more radiation.
- Emissivity is a measure of how much radiation an object absorbs.
- Emissivity is a characteristic of the radiating material's surface. (correct)
- Emissivity is a measure of an object's temperature.
What happens to the radiant heat flow from an object with high emissivity?
What happens to the radiant heat flow from an object with high emissivity?
- It remains the same.
- It increases. (correct)
- It decreases.
- It becomes zero.
What factors determine the net rate of radiant heat flow from an object?
What factors determine the net rate of radiant heat flow from an object?
- The object's emissivity and temperature difference between the object and its surroundings. (correct)
- The object's temperature only.
- The temperature difference between the object and its surroundings.
- The object's emissivity only.
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