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 55 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?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Did you know?

Though methadone is often used to treat dependency on other opioids, the drug itself can be abused. Crushing or snorting methadone can achieve the opiate "rush" desired by addicts. Improper use such as these can lead to a dangerous dependency on methadone. This drug now accounts for nearly one-third of opioid-related deaths.

Lung Image Lung Image
The photo shows an ultrasound image of a fetus of about 20 weeks’ gestational age. The photo shows an ultrasound image of a fetus of about 20 weeks’ gestational age.
Bones do not allow the X-ray beam to pass through them, resulting in an image of the bones on the ... Bones do not allow the X-ray beam to pass through them, resulting in an image of the bones on the ...
Withdrawing Medication from Single-Dose or Multiple-Dose Vials Withdrawing Medication from Single-Dose or Multiple-Dose Vials
How to apply integration by parts on a single function How to apply integration by parts on a single function
The Retinal Image The Retinal Image
Video: Structure of a Ribosome

For a complete list of videos, visit our video library