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

Author Question: Explain why the observable properties of quasars imply that they are objects from the early Universe ... (Read 56 times)

bobthebuilder

  • Hero Member
  • *****
  • Posts: 567
on: Jul 27, 2018
Explain why the observable properties of quasars imply that they are objects from the early Universe controlled by supermassive black holes.
 
  What will be an ideal response?

Question 2

The visible surface of the Sun is composed of solid matter.
 
  a. True
  b. False
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ebe

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Jul 27, 2018
Answer to Question 1

Quasars have continuous spectra with emission lines of hydrogen. The emission lines display very high redshifts, often greater than 1.0 . The high redshifts are proof that quasars are very distant. A large distance is associated with a long look-back time, so quasars must come from the early Universe.

In order to be visible at such large distances, quasars must be very luminous. The luminosity of a quasar can vary in very short times, sometimes as short as a few hours. The rapid fluctuations show that quasars are small objects, smaller than our Solar System. The only reasonable explanation for a compact, fluctuating high-luminosity source is a supermassive black hole.

Answer to Question 2

False


bobthebuilder

  • Member
  • Posts: 567
Reply 2 on: Jul 27, 2018
:D TYSM

parker125

  • Member
  • Posts: 332
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Early History of the Universe Early History of the Universe
Soothing environments and familiar objects can help reduce behavioral problems with some dementia ... Soothing environments and familiar objects can help reduce behavioral problems with some dementia ...
Early Pottery From Japan's Jomon Culture Early Pottery From Japan's Jomon Culture
Early geologists discovered evidence of past glaciations in U-shaped valleys Early geologists discovered evidence of past glaciations in U-shaped valleys
The early onset of spring melting and the gradual diminution of summer snowpack The early onset of spring melting and the gradual diminution of summer snowpack
Skeletal Elements of Early Reptile Skeletal Elements of Early Reptile
Video: Virtual Tour of the Heart

For a complete list of videos, visit our video library