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Author Question: During which of the following phases of life is a star's pressure and gravity out of equilibrium? ... (Read 18 times)

jrubin

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on: Jul 27, 2018
During which of the following phases of life is a star's pressure and gravity out of equilibrium?
 
  A) main sequence
  B) helium core fusion
  C) white dwarf
  D) red giant
  E) A star is never out of equilibrium.

Question 2

How can astronomers measure the period of a planet's orbit?
 
  A) by measuring the time between peaks in the star's velocity curve
  B) by timing the cycle of small changes in a stars position on the sky
  C) by measuring the time between repeated transits
  D) all of the above


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adf223

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

D


jrubin

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Reply #2 on: Jul 27, 2018
Thank you!


adf223

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Reply #3 on: Jul 27, 2018
Always glad to help...


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