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Eighty Percent of the Stars on the H-R Diagram Are

Question 10

Multiple Choice

Eighty percent of the stars on the H-R diagram are on the main sequence, and that is because the star is in hydrostatic equilibrium due to the _____.

A) degenerate property of hydrogen
B) degenerate property of helium
C) Hertzsprung-Russell principle
D) fusion of hydrogen
E) fusion of helium

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