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Author Question: How does the escape speed from Mars compare with that of the Earth? MEarth=9.31 MMars; REarth=1.88 ... (Read 84 times)

dbose

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on: Jul 27, 2018
How does the escape speed from Mars compare with that of the Earth?  MEarth=9.31 MMars; REarth=1.88  RMars
 
  A) 222.
  B) 22.5
  C) 44.9
  D) 66.2
  E) 20.2

Question 2

The 1420 MHz (21 cm) radio line generated by neutral hydrogen atoms is a good choice for interstellar communications because
 
  A) it is the easiest radio frequency to generate
  B) it is the only radio frequency that is not blocked by interstellar matter
  C) all intelligent civilizations should be aware of its universal significance and would probably also think of sending and receiving signals at this frequency
  D) it is the only frequency to which radio telescopes can be tuned


tdewitt

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

C

Answer to Question 2

C


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