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Author Question: Recent high resolution radio observations show that quasars can be classified as a. exploding ... (Read 86 times)

genevieve1028

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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


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ju

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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

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Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

daiying98

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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