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The energy emitted from a piece of metal is measured by a radiation thermometer, and the temperature is determined to be 10500 degrees C, assuming

The energy emitted from a piece of metal is measured by a radiation thermometer, and the temperature is determined to be 10500 degrees C, assuming a surface impassivity of 0.82. It is later found that the true impassivity of the material is 0.75. Calculate the error (difference of the temperature determination) caused by the wrong impassivity.

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