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Author Question: The time a protostar takes to contract from a cool interstellar gas cloud to a main-sequence star ... (Read 74 times)

james0929

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on: Jul 27, 2018
The time a protostar takes to contract from a cool interstellar gas cloud to a main-sequence star depends on its _____.
 
  A) volume
  B) luminosity
  C) mass
  D) temperature

Question 2

_____ say that certain things cannot be created out of nothing or vanish into nothing.
 
  A) Conservation laws
  B) Laws of kinematics
  C) Laws of planetary motion
  D) Illuminance laws


lolol

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

C

Answer to Question 2

A


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