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

Author Question: The hydrogen lines in spectral type A stars a. are most narrow for supergiants. b. are most ... (Read 82 times)

dalyningkenk

  • Hero Member
  • *****
  • Posts: 598
on: Jul 27, 2018
The hydrogen lines in spectral type A stars
 
  a. are most narrow for supergiants.
  b. are most narrow for main-sequence stars.
  c. can not be used to estimate the luminosity of the star.
  d. are very weak and difficult to see.
  e. are useful in determining the apparent magnitude of the star.

Question 2

The ____ of a telescope is a measure of its ability to show fine detail and depends on the diameter of the objective.
 
  a. light-gathering power
  b. focal length
  c. magnifying power
  d. resolving power
  e. spherical aberration


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

batool

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Jul 27, 2018
Answer to Question 1

a

Answer to Question 2

d


dalyningkenk

  • Member
  • Posts: 598
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

sailorcrescent

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

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

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Examples of the results of sexual selection, a type of natural selection. Examples of the results of sexual selection, a type of natural selection.
Hydrogen bonding of water with itself and with other compounds Hydrogen bonding of water with itself and with other compounds
Water consumption by type of use Water consumption by type of use
Canada Total Energy Consumption by Fuel Type Canada Total Energy Consumption by Fuel Type
Comparison of D-type Climates Comparison of D-type Climates
Hydrogen Bond with Peptide Hydrogen Bond with Peptide
Video: B cells and antibodies

For a complete list of videos, visit our video library