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Author Question: The terrestrial planets have a. relatively high densities. b. solid surfaces. c. weak magnetic ... (Read 79 times)

LCritchfi

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on: Jul 28, 2018
The terrestrial planets have
 a. relatively high densities.
  b. solid surfaces.
  c. weak magnetic fields.
  d. all of these.

Question 2

The Doppler effect is observed only when
 a. the source of a wave moves toward a stationary observer.
  b. there is relative motion between the source of a wave and an observer.
  c. an observer moves toward the stationary source of a wave.
  d. both the source of a wave and an observer are moving toward each other.


jojobee318

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Reply #1 on: Jul 28, 2018
Answer to Question 1

d

Answer to Question 2

b


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LCritchfi

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Reply #2 on: Jul 28, 2018
Thanks


jojobee318

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Reply #3 on: Jul 28, 2018
Welcome :)


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