The fraction of the mass of a red giant that is ejected as a shell in a planetary nebula is:
A) almost the whole star, greater than 90%.
B) substantial, up to 40%.
C) extremely small, less than 1 part in 104.
D) small, close to 0.01, or 1%.
Correct Answer:
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Q20: A planetary nebula is:
A)a contracting spherical cloud
Q21: A planetary nebula is created:
A)over several hundred
Q22: The major source of light in the
Q23: The typical diameter of a planetary nebula
Q24: The core of a planetary nebula has
Q26: What will be the mass of the
Q27: The shell of a planetary nebula is
Q28: Out of all matter ejected into the
Q29: What fraction of the material returned to
Q30: Which of the following important components does
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