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b. Star A has a mass of 20 solar mass and star B has a mass of 6 solar masses. c. Star A has a mass of 31.2 solar mass and star B has a mass of 5.2 solar masses. d. ... 54. In the proton-proton chain a. no neutrinos are produced. b. energy is released because a helium nucleus has a greater mass than a hydrogen nucleus. c.
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hoth.ncat.edu/~michael/moonstruck/astrotrivia/stars.htm...
hoth.ncat.edu/~michael/moonstruck/astrotrivia/stars.html
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The Helium Flash and Triple Alpha Process ... For stars with less than 0.5 solar masses however, their is insufficient mass to generate the temperatures need for the helium in the core to start fusing. A brief period of hydrogen-shell burning sees its luminosity rise as with higher-mass stars.
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outreach.atnf.csiro.au/education/senior/astrophysics/st...
outreach.atnf.csiro.au/education/senior/astrophysics/stellarevolution_postmain.html
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Low Mass Stars ... Stars with masses less than about 1.1 solar masses have no convection in their cores. ... Stars with masses below about 2 solar masses have cores that are degenerate (see below) when helium fusion begins. This means that the helium fusion begins all at once in a big flash called the helium flash.
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www.nrao.edu/~smyers/courses/astro12/L16.html
www.nrao.edu/~smyers/courses/astro12/L16.html
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____ 5. A star will experience a helium flash if ... c. its mass on the main sequence was less than 0.1 solar masses. ... What is the approximate age of the star cluster in the diagram below? .... 2. c. 3. d. 4. e. 5 ... Even the youngest star clusters have no stars still contracting toward the main sequence. ...
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www.physics.unt.edu/~roberts/Pics/Spring/Testprep3/CHP%...
www.physics.unt.edu/~roberts/Pics/Spring/Testprep3/CHP%2012.doc
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Since the available fuel is effectively the mass of the star, the lifetime will be approximately proportional to 1/Mass2.5. A star of 10 solar masses can thus be expected to go through its life cycle about 300 times faster than the sun, ... With an age of a billion years, cluster stars with masses between 2--3 M are...
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casswww.ucsd.edu/public/tutorial/StevII.html
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Finally, as this last burp of energy generated by the helium flash slowly reaches the surface, ... So far, no white dwarfs of more than 1.4 solar masses have been found, ... Nothing that comes within the Schwarzchild Radius (3 kilometers times the mass of the singularity in solar masses) can escape it. As far as the outer layers of...
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www.stellar-database.com/evolution.html
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2. The proton-proton chain needs high temperature because ... 7. The diagram below is an HR diagram. The line indicates the location of the main sequence. Which of the five labeled locations on the HR diagram indicates a luminosity ... stars with a mass less than 0.5 solar masses will not go through helium flash.
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tigre.ucr.edu/dipen/astro/test4/astr4.htm
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It converts about 4.5 million tons of matter into energy every second by nuclear fusion reactions in its core, producing neutrinos and solar radiation. ... The Sun is a typical member of the spectral class dG2, stars of surface temperature 6000 K. ... The most spectacular activity associated with sunspots is the solar flare ( Fig. 2).
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www.answers.com/topic/sun
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2. The nuclear reactions in a star's core remain under control so long as ... 5. Interstellar gas clouds may collapse to form stars if they. a. have .... e. helium flash destroys many of the stars before they can become giants and ... e. stars with a mass less than 0.5 solar masses will not go through helium flash. ...
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www.physics.sfsu.edu/~lwilliam/hw5.html
www.physics.sfsu.edu/~lwilliam/hw5.html
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