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    Viral theorem for the age of a star of constant luminosity

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    Please see attached, but the basic problem is how to rearrange the viral theorem into a form that describes the time taken for a star of uniform density and constant luminosity to reach its current radius. on the attachment are some of my notes on what i need to consider, please can you show me the full working to help me understand.

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    https://brainmass.com/physics/stars/viral-theorem-age-star-constant-luminosity-80546

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    Your assignment talks about a star of CONSTANT LUMINOSITY.

    Therefore you cannot use the Stefan-Boltzmann Law for luminosity, as then it WOULD NOT BE CONSTANT

    In my understanding of your assignment, you are given the ...

    Solution Summary

    Virial theorems for the age of a star of constant luminosity is determined. Uniform density and constant luminosity is analyzed.

    $2.19