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Question: 3 a describe the complete evolution of the main sequence...

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3. (a) Describe the complete evolution of the main sequence stars with the respective masses below, giving attention of the physical transformations in them. (0) 0.1 solar mass (i) 1 solar mass (ii) 10 solar mass (iv) 80 solar mass (30 marks) (b) Use appropriate Hertzsprung-Russell (HR) diagrams to help further explain the evolution of all the stars above, giving attention to their absolute magnitudes. (30 marks) 4/6 SMES2407 (c) The Suns luminosity is 3.85 x 102 Watt and its surface temperature is approximately 6,000 K. Use the Stefans Law to calculate its radius. Use this law to estimate the radius of stars located on the above left and below right to the Sun in the HR diagram.

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