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A black body emits heat at the rate of 20 W .When its temperature is 727 degrees C.Another black body emits heat at the rate of 15 W,when its temperature is 227 degrees C.Compare the area of the surface of the two bodies,if the surrounding is at NTP |
| Answer» A black body emits heat at the rate of 20 W .When its temperature is 727 degrees C.Another black body emits heat at the rate of 15 W,when its temperature is 227 degrees C.Compare the area of the surface of the two bodies,if the surrounding is at NTP | |