Example Questiosn for Chapter 12

Example Questiosn for Chapter 12 - the two stars orbit so...

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Willie Reaves PHYS 116 Dr. Williamon 3 Nov 2011 Ch. 12 Questions 1. The helium fusion process converts three helium nuclei into one nucleus of which element? a. Neutral Argon b. Carbon-12 (CORRECT ANSWER) c. Carbon-14 d. Iridium 2. Low mass stars are unable to create elements heavier than carbon because ________ halt(s) the contraction of their inert carbon before they can become hot enough for fusion. a. Helium-capture reactions b. Incomplete CNO cycles c. Excessive expansion d. Degeneracy pressure (CORRECT ANSWER) 3. Briefly explain the Algol paradox. We would normally expect that Algol’s more massive star would have stopped fusing hydrogen while its less massive star would not be a subgiant. However, it is believed that
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Unformatted text preview: the two stars orbit so closely to each other that the gravities and rotations are affected by each other. 4. Which of the following is the only element that does not release energy when it is fused? a. Einsteinium b. Hydrogen c. Iron (CORRECT ANSWER) d. Carbon, but only when its outermost energy shell is not full e. What are you talking about? ALL elements release energy when fused! 5. Failed stars are referred to as what? a. Brown dwarfs (CORRECT ANSWER) b. Earth c. Black dwarfs d. Planetary nebulae...
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