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Author Question: You are measuring how velocity changes with time of two stars like the Sun in order to detect their ... (Read 57 times)

serike

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on: Jul 27, 2018
You are measuring how velocity changes with time of two stars like the Sun in order to detect their planets.
 
  Both stars have a velocity curve with a periods of 2 years, but the maximum size (peak-to-peak amplitude) of the velocity curve of star A is 100 km/s, and for star B it is 200 km/s. What causes this difference? Assume the planets are named after their stars.
  A) Planet A is farther from Star A than Planet B is from Star B.
  B) Planet A is closer to Star A than Planet B is to Star B.
  C) Planet A is more massive than Planet B.
  D) Planet A is less massive than Planet B.
  E) Not possible to say, since you're measuring the velocity curve of the stars, not the planets.

Question 2

Why do quasars die out over time?
 
  What will be an ideal response?


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karmakat49

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Reply #1 on: Jul 27, 2018
Answer to Question 1

D

Answer to Question 2

The black hole at their center consumes the fuel supply close to it. As less material falls into the central engine, less radiation is given off.


serike

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Reply #2 on: Jul 27, 2018
Thanks


karmakat49

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Reply #3 on: Jul 27, 2018
Welcome :)


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