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 53 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

Hdosisshsbshs

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

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.

By distancing themselves from the social reformers, early American sociologists ignored female ... By distancing themselves from the social reformers, early American sociologists ignored female ...
Piaget was one of the first to go beyond observable behavior in an attempt to determine how infants ... Piaget was one of the first to go beyond observable behavior in an attempt to determine how infants ...
Nonmetal Hydrides and Their Properties Nonmetal Hydrides and Their Properties
Early Pottery From Japan's Jomon Culture Early Pottery From Japan's Jomon Culture
Properties of Eukaryotic DNA Polymerases Properties of Eukaryotic DNA Polymerases
Two early Homo skulls Two early Homo skulls
Video: Contraction and Relaxation Animation

For a complete list of videos, visit our video library