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Q. |
Which of the following reaction is the main cause of energy radiated from Sun? |
A. | Nuclear fission |
B. | Nuclear fusion |
C. | Chemical reaction |
D. | Diffusion reaction |
Answer» B. Nuclear fusion | |
Explanation: The Sun is a main-sequence star, and thus generates its energy bynuclear fusion of hydrogen nuclei into helium. In its core, the Sunfuses 620 million metric tons of hydrogen each second. |
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