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 43 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
:D TYSM

cassie_ragen

  • Member
  • Posts: 347
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

Bipolar disease. The term bipolar means “pertaining to two poles.” The individual with this form of Bipolar disease. The term bipolar means “pertaining to two poles.” The individual with this form of
Radio Radio
Radio Telescope Used for SETI Radio Telescope Used for SETI
Some drug labels show the USP symbol; others do not. Some drug labels show the USP symbol; others do not.
The primary ignition system is used to trigger and therefore create the secondary (high-voltage) ... The primary ignition system is used to trigger and therefore create the secondary (high-voltage) ...
High school science classes are required to use deductive logic High school science classes are required to use deductive logic
Video: Interview with Person having Obsessive Compulsive Disorder

For a complete list of videos, visit our video library