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1. |
The radiant heat transfer from a plate of 2.5 cm2 area at 1250 K to a very cold enclosure is 5.0 W. Determine the emissivity of the plate at this temperature |
A. | 0.444 |
B. | 0.344 |
C. | 0.244 |
D. | 0.144 |
Answer» E. | |