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

Author Question: How can the image of a single quasar be doubled? What does that tell us about the quasar's distance? ... (Read 116 times)

oliviahorn72

  • Hero Member
  • *****
  • Posts: 579
on: Jul 27, 2018
How can the image of a single quasar be doubled? What does that tell us about the quasar's distance?
 
  What will be an ideal response?

Question 2

One of the effects of Mercury's very slow spin is
 
  A) tectonic activity.
  B) large variations in the size of its polar cap.
  C) an intensely powerful magnetic field.
  D) wind patterns that are slow, but global in size.
  E) extreme variations in its surface temperature.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

vickyvicksss

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jul 27, 2018
Answer to Question 1

If the gravity of a massive foreground galaxy bends the quasar's light, it can create multiple images. The quasar must be behind and at a much great distance from us than the lensing galaxy.

Answer to Question 2

E


oliviahorn72

  • Hero Member
  • *****
  • Posts: 579
Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


vickyvicksss

  • Sr. Member
  • ****
  • Posts: 351
Reply #3 on: Jul 27, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough
Using Parallax to Determine Distance Using Parallax to Determine Distance
Functional brain imaging is the major method of cognitive neuroscience. This image—taken from the ... Functional brain imaging is the major method of cognitive neuroscience. This image—taken from the ...
Single-Cell Model Single-Cell Model
The Retinal Image The Retinal Image
The structure of a single developed neuron The structure of a single developed neuron
Video: Ear Animation

For a complete list of videos, visit our video library