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

Author Question: Recent high resolution radio observations show that quasars can be classified as a. exploding ... (Read 28 times)

genevieve1028

  • Hero Member
  • *****
  • Posts: 601
on: Jul 27, 2018
Recent high resolution radio observations show that quasars can be classified as
 
  a. exploding supernova stars.
  b. exploding planets.
  c. normal galaxies like our Milky Way Galaxy.
  d. a kind of active galaxy similar to Seyfert and radio galaxies.

Question 2

A planetary nebula has a radius of 0.5 pc and is expanding at 20 km/s. What is the approximate age of this planetary nebula? (1 pc is equal to 31013 km and 1 year is equal to 3.15107 seconds.)
 
  a. 240 years
  b. 790,000 years
  c. 96,000 years
  d. 960 years
  e. 24,000 years


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ju

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jul 27, 2018
Answer to Question 1

d

Answer to Question 2

e
RATIONALE: age = radius/speed. Convert from seconds to years.


genevieve1028

  • Member
  • Posts: 601
Reply 2 on: Jul 27, 2018
Wow, this really help

smrtceo

  • Member
  • Posts: 344
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
High Resolution Logo High Resolution Logo
Graduating High School Graduating High School
Effect of dietary fats on high- and low-density cholesterol levels Effect of dietary fats on high- and low-density cholesterol levels
How high a hill would a 75-kg hiker have to climb to increase her gravitational potential ... How high a hill would a 75-kg hiker have to climb to increase her gravitational potential ...
Chalk cliffs 90 meters (300 feet) high along the shore in Dover, England, were once seafloor Chalk cliffs 90 meters (300 feet) high along the shore in Dover, England, were once seafloor
Video: Non-specific disease resistance mechanisms & Skin's defense barriers

For a complete list of videos, visit our video library