Q2) If 10% of the mass in the Sun (i.e., 0.1 M of hydrogen atoms) will...

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Q2) If 10% of the mass in the Sun (i.e., 0.1 M of hydrogen atoms) will be converted to helium, how long will that take; i.e., what is the expected main sequence lifetime of the Sun? You may assume that the current solar luminosity is approximate the lifetime average for the Sun. Q2) If 10% of the mass in the Sun (i.e., 0.1 M of hydrogen atoms) will be converted to helium, how long will that take; i.e., what is the expected main sequence lifetime of the Sun? You may assume that the current solar luminosity is approximate the lifetime average for the Sun.