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Science-Related Homework Help Astronomy Topic started by: Jkader on Mar 19, 2018



Title: Whether the Universe is open, closed or flat depends, on the ___________ of the Universe.
Post by: Jkader on Mar 19, 2018
Whether the Universe is open, closed or flat depends, on the ___________ of the Universe.
 
  a. luminosity
  b. density
  c. temperature
  d. radius
  e. rotation rate

Question 2

Why can't lower-main-sequence stars become giant stars?
 
  What will be an ideal response?

Question 3

Seeds around which galaxies, clusters and walls grew may have been ___________ before inflation and recombination.
 
  a. caused by hot dark matter
  b. caused by baryons
  c. the result of the separation of the electromagnetic and weak forces
  d. the result of freezing water molecules shortly after the Universe became transparent to photons
  e. caused by initially tiny quantum mechanical fluctuations in space-time


Title: Whether the Universe is open, closed or flat depends, on the ___________ of the Universe.
Post by: ahleaders on Mar 19, 2018
Answer to q. 1

b

Answer to q. 2

Stars between 0.08 and about 0.4 solar mass, the red dwarfs, are mixed by convection, and so can't develop inert helium cores surrounded by unprocessed hydrogen. For this reason a red dwarf can never ignite a hydrogen shell and can't become a giant star.

Answer to q. 3

e


Title: Whether the Universe is open, closed or flat depends, on the ___________ of the Universe.
Post by: Jkader on Mar 19, 2018
Words can't even express my thanks


Title: Whether the Universe is open, closed or flat depends, on the ___________ of the Universe.
Post by: ahleaders on Mar 19, 2018
Pleasure is all mine