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

Author Question: The density wave theory explains spurs and branches along the spiral arms. a. True b. False ... (Read 102 times)

Diane

  • Hero Member
  • *****
  • Posts: 576
on: Jul 27, 2018
The density wave theory explains spurs and branches along the spiral arms.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

A spectral line produced in the atmosphere of a star may be seen as broad whereas interstellar _______________ lines are very narrow.
 
  a. absorption b. continuous
  c. emission d. All of the other choices are correct.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jordangronback

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

False

Answer to Question 2

a


Diane

  • Member
  • Posts: 576
Reply 2 on: Jul 27, 2018
Wow, this really help

TheDev123

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

A single-gene model explains Mendel’s ratios A single-gene model explains Mendel’s ratios
Richard Wrangham’s “female-bonded” theory of intergroup competition was highly influential in our un Richard Wrangham’s “female-bonded” theory of intergroup competition was highly influential in our un
With the rocker arms contacting the base circle of the cam, insert a feeler gauge of the specified ... With the rocker arms contacting the base circle of the cam, insert a feeler gauge of the specified ...
In plant fossils, stomatal density is used to estimate CO2 concentration in the atmosphere In plant fossils, stomatal density is used to estimate CO2 concentration in the atmosphere
Bronfenbrenner's bioecological theory Bronfenbrenner's bioecological theory
Physics - Density and Pressure Physics - Density and Pressure
Video: Mendel's pea plant, Pisum sativum experimental

For a complete list of videos, visit our video library