« 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 114 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?

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?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Surface magnetic field of SU Aur (a young star of T Tauri type), reconstructed by means of Zeeman-Do Surface magnetic field of SU Aur (a young star of T Tauri type), reconstructed by means of Zeeman-Do
The asymmetrical appearance of Mira, an oscillating variable star. The asymmetrical appearance of Mira, an oscillating variable star.
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
Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
The Structure of an Old Low-Mass Star The Structure of an Old Low-Mass Star
Brittle Star Brittle Star
Video: Structures that affect circulation - arterioles and vasomotor responses

For a complete list of videos, visit our video library