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1. |
Two spheres made of same material have radii in the ratio 2: 1. If both the spheres are at same temperature, then what is the ratio of heat radiation energy emitted per second by them? |
A. | 1: 4 |
B. | 4: 1 |
C. | 3: 4 |
D. | 4: 3 |
Answer» C. 3: 4 | |