A cube at 100°C radiates heat at a rate of 80.0 J/s. If its surface temperature is increased to 200°C, the rate at which it will now radiate is closest to
A) 160 J/s.
B) 207 J/s.
C) 320 J/s.
D) 640 J/s.
E) 1280 J/s.
B
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