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

Author Question: The chemical abundance of population I stars a. indicates that they were formed before the ... (Read 55 times)

Alygatorr01285

  • Hero Member
  • *****
  • Posts: 564
on: Jul 27, 2018
The chemical abundance of population I stars
 
  a. indicates that they were formed before the population II stars.
  b. indicates that the material they formed from had been enriched with material from supernovae.
  c. indicates that they contain very few heavy metals compared to halo stars.
  d. depends on the temperature of the star.
  e. depends on the mass of the star.

Question 2

How do astronomers know that the newly found L and T spectral types represent objects cooler than M spectral class?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Perkypinki

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

L star spectra contain bands produced by molecules such as iron hydride. T star spectra show absorption by methane and water vapor. Because these molecules can't exist in high-temperature stars, these objects must be relatively cool.


Alygatorr01285

  • Member
  • Posts: 564
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

yeungji

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

Did you know?

All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Trap set to monitor the wild population in the Dryandra Woodland Trap set to monitor the wild population in the Dryandra Woodland
Energy coupling in mechanical and chemical processes Energy coupling in mechanical and chemical processes
An example of a urine chemical analyzer. An example of a urine chemical analyzer.
Application of a Cold Chemical Pack Application of a Cold Chemical Pack
World Population Growth World Population Growth
Population Growth Versus Stability Population Growth Versus Stability
Video: Pressure Flow Model Animation

For a complete list of videos, visit our video library