« 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 66 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?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Venous Star Venous Star
"Visual Acuity Testing, Assessing Distance Vision "Visual Acuity Testing, Assessing Distance Vision
Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period Mars's average distance from the Sun is roughly 230 million km (1.5 AU) and its orbital period
Torque is a twisting force equal to the distance from the pivot point times the force applied ... Torque is a twisting force equal to the distance from the pivot point times the force applied ...
The inverse-square law and its effects. Doubling your distance away from a radioactive material ... The inverse-square law and its effects. Doubling your distance away from a radioactive material ...
2. Given 4 vectors with magnitude of : 2. Given 4 vectors with magnitude of :
Video: Blood Test Basics

For a complete list of videos, visit our video library