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Assume the initial gravitational potential energy of the star is zero, and it has had a constant luminosity of 4.5 × 102

Posted: Wed Jun 08, 2022 10:46 am
by answerhappygod
Assume the initial gravitational potential energy of the star is
zero, and it has had a constant luminosity of 4.5 ×
1026 W for about 5 billion years. Find out by
numerical calculation if the source of the radiation energy of the
star is from its released gravitational energy through its
contraction.