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OpenStudy (anonymous):
Our sun in the Main Sequence(MS) burns 10% of its total mass in the core. In the nuclear fusion reaction 0.7% of mass is converted in to energy. The total energy output of the Sun in one second is L= 3.845x1026 J. The mass of the Sun M= 1.9891x1030 Kg. Using the Einstein’s famous equation for energy and mass, E=mc2 find the life time of the Sun in the main sequence in billions of years.
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