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    Discovering the Essential Universe
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    Exam 11: The Lives of the Stars From Birth Through Middle Age
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    When a Variable Star Periodically Changes Its Luminosity,each of the Following
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When a Variable Star Periodically Changes Its Luminosity,each of the Following

Question 153

Question 153

Multiple Choice

When a variable star periodically changes its luminosity,each of the following also changes periodically EXCEPT ONE.Which is the exception?


A) temperature
B) radial surface speed
C) size
D) rotation rate

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