This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: How is the age of the galaxy determined? a. measuring the metallicity of Population II stars b. ... (Read 94 times)

Shelles

  • Hero Member
  • *****
  • Posts: 582
on: Jul 27, 2018
How is the age of the galaxy determined?
 
  a. measuring the metallicity of Population II stars
  b. finding the turnoff point in the H-R diagram of globular clusters
  c. from the motion of stars in the galactic halo
  d. counting the number of open clusters in the spiral arms

Question 2

The free-fall contraction of a molecular cloud
 
  a. can be initiated by shock waves from supernovae.
  b. can be initiated by nearby spectral type G stars.
  c. can be initiated by the rotation of the cloud.
  d. causes the cloud to become transparent to ultraviolet radiation.
  e. causes the particles in the cloud to decrease the speed with which they move.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Pswine

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

a


Shelles

  • Member
  • Posts: 582
Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

cdmart10

  • Member
  • Posts: 332
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

If all the neurons in the human body were lined up, they would stretch more than 600 miles.

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

Cyanide works by making the human body unable to use oxygen.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Interaction web of factors that might influence locust population size. Interaction web of factors that might influence locust population size.
Estimating cicada population size and predation rates by birds. Estimating cicada population size and predation rates by birds.
The "Emu in the sky," a constellation defined by dark clouds rather than the stars. The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Measuring the Weight and Length of an Infant Measuring the Weight and Length of an Infant
Using the measuring device to give the correct dose to children Using the measuring device to give the correct dose to children
Video: Supine Position

For a complete list of videos, visit our video library