« previous next »

Author Question: Star A and star B both have an apparent magnitude of 7.0, but star A is at a distance of 15 pc and ... (Read 117 times)

fox

  • Hero Member
  • *****
  • Posts: 540
on: Jul 27, 2018
Star A and star B both have an apparent magnitude of 7.0, but star A is at a distance of 15 pc and star B is at a distance of 30 pc. Which statement below is correct?
 
  A) Star A appears brighter than star B, but star B and star A have the same intrinsic brightness.
  B) Star B appears brighter than star A, but star B and star A have the same intrinsic brightness.
  C) Star A and star B appear to have the same brightness, but star B is intrinsically brighter than star A.
  D) Star A and star B appear to have the same brightness, but star A is intrinsically brighter than star B.
  E) It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above.

Question 2

Radio dishes are large in order to:
 
  A) attract funding from NASA and the NSF.
  B) give greater magnification.
  C) increase their angular resolution and collect the very weak radio photons.
  D) increase the range of waves they can collect.
  E) detect shorter waves than optical telescopes for superior resolution.


akudia

  • Sr. Member
  • ****
  • Posts: 347
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

fox

  • Hero Member
  • *****
  • Posts: 540
Reply #2 on: Jul 27, 2018
TY


akudia

  • Sr. Member
  • ****
  • Posts: 347
Reply #3 on: Jul 27, 2018
You're welcome


« previous next »
 

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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.

Local/long distance cell Signaling Local/long distance cell Signaling
Apparent Magnitude Scale Apparent Magnitude Scale
A star link-type network where all of the modules are connected together using splice packs. A star link-type network where all of the modules are connected together using splice packs.
How to solve a distance, time, speed problem using linear algebra How to solve a distance, time, speed problem using linear algebra
energy of interaction and distance of particle energy of interaction and distance of particle
Sunflower Sea Star, California. Sunflower Sea Star, California.
Video: Interpreting a cladogram Animation

For a complete list of videos, visit our video library