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

Author Question: Why is it that the quasars we see represent a time when the universe was younger? What will be an ... (Read 36 times)

xclash

  • Hero Member
  • *****
  • Posts: 681
on: Jul 27, 2018
Why is it that the quasars we see represent a time when the universe was younger?
 
  What will be an ideal response?

Question 2

Which statement about seismic waves is TRUE?
 
  A) Only S waves can travel through liquid.
  B) P waves travel faster, and thus arrive sooner than do the S waves.
  C) In the shadow zones, neither type is observed.
  D) S waves can travel though the outer core, but P waves cannot.
  E) On the far side of the Earth, only the S waves on the surface can be detected.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

parshano

  • Sr. Member
  • ****
  • Posts: 333
Reply #1 on: Jul 27, 2018
Answer to Question 1

Quasars have very large redshifts, corresponding to large cosmological distances. Since the light they emitted travels at a finite velocity, it must have left the quasar many billions of years ago.

Answer to Question 2

B


xclash

  • Member
  • Posts: 681
Reply 2 on: Jul 27, 2018
Excellent

nathang24

  • Member
  • Posts: 314
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

The span of Homo sapiens sapiens’ time on earth The span of Homo sapiens sapiens’ time on earth
Time dependence of the rates of a chemical reaction Time dependence of the rates of a chemical reaction
Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called Earth’s history is divided into nested sets of time--eons, eras, periods, and epochs--and is called
Gossip and ridicule increase the status insecurity of this time of life. Gossip and ridicule increase the status insecurity of this time of life.
Disitive Time For Fish Disitive Time For Fish
Surtsey, a volcanic island, during the time of its formation. Surtsey, a volcanic island, during the time of its formation.
Video: Renin/Angiotensin (water gain from urine & Na ion and water reabsorption)

For a complete list of videos, visit our video library