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Author Question: Both RR Lyrae and Cepheid variable stars are stars that, when on the main sequence, were considered ... (Read 106 times)

cnetterville

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on: Jul 27, 2018
Both RR Lyrae and Cepheid variable stars are stars that, when on the main sequence, were considered to be:
 
  A) low mass.
  B) intermediate mass.
  C) high mass.
  D) zero-age main sequence.
  E) blue stragglers.

Question 2

The period from about 100 seconds up to 15 minutes after the Big Bang is the:
 
  A) Radiation Era.
  B) Lepton Epoch.
  C) Nuclear Epoch.
  D) Decoupling Epoch.
  E) Matter Era.


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krakiolit

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

C

Answer to Question 2

C


cnetterville

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Reply 2 on: Jul 27, 2018
Gracias!

meow1234

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Reply 3 on: Yesterday
:D TYSM

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