Answered

Why is hydrogen burning the main energy source for main-sequence stars?

A. Hydrogen is the most common element in stars.
B. Hydrogen nuclei have the smallest positive charge.
C. Hydrogen burning is the most efficient of all fusion or fission reactions.
D. All are valid reasons.



Answer :

GinnyAnswer

Final answer:

Hydrogen burning powers main-sequence stars through efficient fusion reactions due to hydrogen's abundance and effectiveness as a fuel source.


Explanation:

Hydrogen burning is the main energy source for main-sequence stars primarily because hydrogen is the fuel for fusion reactions in stars. As the most abundant element in the Universe, hydrogen is an ideal and efficient 'fuel' for stars, providing the energy needed to sustain them through nuclear fusion processes in their cores.


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