Which of the stars in the H-R diagram is fusing hydrogen into helium in its
core?
A: Star 8
B: Star 2
C: Star 10
D: Star 12
Ans- C
Which star in the H-R diagram does not have any fusion occurring in it at all?
A: Star 8
B: Star 4
C: Star 12
D: Star 1
Ans- C
Which of these stars...
ISP 205 Test 3 Questions and Answers Which of the stars in the H -R diagram is fusing hydrogen into helium in its core? A: Star 8 B: Star 2 C: Star 10 D: Star 12 Ans- C Which star in the H -R diagram does not have any fusion occurring in it at all? A: Star 8 B: Star 4 C: Star 12 D: Star 1 Ans- C Which of these stars in the H -R diagram could have a core that is building up iron right now? A: Star 1 B: Star 4 C: Star 12 D: Star 8 Ans- B What happens to the core of a star after fusion turns all of the core hydrogen into helium? A: It expands and heats up. B: It contracts and cools down. C:It contracts and heats up. D:It expands and cools down. Ans- C Which of the following things can halt gravitational contraction of a star's core? A:Either degeneracy pressure or nuclear fusion can stop the contraction, depending on the star's mass. B: Only degeneracy pressure can stop the contraction. C: Only the energy released by nuclear fusion can stop the contraction. D: Neither degeneracy pressure nor nuclear fusion can stop the contraction. Ans- A Suppose you were able to measure the composition of the first star in the Milky Way, what would you expect it to be made of at the time of its birth? A: 98 \% hydrogen, 2 \% helium, less than 0.1\% other elements
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