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 85 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

triiciiaa

  • Member
  • Posts: 349
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Imaginary Thoracic Lines, Posterior View Imaginary Thoracic Lines, Posterior View
Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s
hydrogen hydrogen
Wild-type versus mutant fly Wild-type versus mutant fly
Hydrogen Molecule Hydrogen Molecule
A typical fuel pulsator used mostly with roller vane-type pumps to help even out the pulsation in ... A typical fuel pulsator used mostly with roller vane-type pumps to help even out the pulsation in ...
Video: Basic rhythm - control centers in medulla oblongata, spirograph and normal tidal cycle

For a complete list of videos, visit our video library