The chemical abundance of population I stars
a. indicates that they were formed before the population II stars.
b. indicates that the material they formed from had been enriched with material from supernovae.
c. indicates that they contain very few heavy metals compared to halo stars.
d. depends on the temperature of the star.
e. depends on the mass of the star.
B
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Answer the following statement true (T) or false (F)
A mass is bouncing on the end of a spring with a period T when measured by a ground observer. What would the period of oscillation be (as measured by the same observer) if the mass and spring were moving past the ground observer at a speed of 0.600c?
a. 0.440 T b. 1.25 T c. 0.600 T d. 1.67 T
Once a star ejects a planetary nebula, it becomes a white dwarf
a. True b. False Indicate whether the statement is true or false
What is the binding energy of an alpha particle?
A. 2.20 MeV B. 50.0 MeV C. 28.29 MeV D. 21.22 MeV