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Author Question: Compared to optical telescopes, radio telescopes are built large because A) radio waves have very ... (Read 126 times)

Anajune7

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on: Jul 27, 2018
Compared to optical telescopes, radio telescopes are built large because
 
  A) radio waves have very long wavelengths.
  B) radio waves are absorbed by the atmosphere.
  C) atmospheric turbulence is more of a problem.
  D) they're less expensive to make than optical telescopes.
  E) radio sources are harder to find.

Question 2

Which three worlds have almost identical densities?
 
  A) Mercury, Mars, and our Moon
  B) Mercury, Venus, and Earth
  C) Earth, Moon, and Mars
  D) Mercury, Earth, and Mars
  E) Deimos, Phobos, and our Moon


Shshxj

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

A

Answer to Question 2

B


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Anajune7

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Reply #2 on: Jul 27, 2018
Thank you!


Shshxj

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Reply #3 on: Jul 27, 2018
Always glad to help...


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