mt2-sample-sa - SHORT ANSWER. Answer the question(s),...

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SHORT ANSWER. Answer the question(s), showing the work of any calculations needed. 34) The escape speed from the surface of the sun is about 600 km/s. What is the escape speed from the surface of a star wtth: a. Mass = 2 Msun and Radius = 1/2 Rsun? b. Mass = 1/2 Mun and Radius = 2 Rsun? 34) 35) What is the mass (in solar masses) of a Black Hole with a (Schwarschild) radius of: a. Rbh = 1 Rsun (Rsun = 700, 000 km) ? b. Rbh = 1 AU ( 1AU = 150, 000, 000 km)? 35) 7
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36) Two stars, Betty and Wilma, are both on the main sequence. Betty is more luminous than Wilma. Which one has a hotter surface temperature? Which one is more massive? Which one is bigger? If they both formed at the same time, which one will evolve off the main sequence Frst? 36) 8
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main sequence star has a mass and radius that are both 10 times that of the sun. 37) a. About what is the star's luminosity, in Lsun? b. Given that the sun will live 10 Billion years on the main sequence, how long will this star live on the main
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This note was uploaded on 02/01/2012 for the course PHYS 133 taught by Professor Staff during the Fall '08 term at University of Delaware.

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mt2-sample-sa - SHORT ANSWER. Answer the question(s),...

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