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Author Question: How many centimeters are there in one kilometer? a. 100 b. 1,000 c. 10,000 d. 100,000 e. ... (Read 24 times)

RODY.ELKHALIL

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on: Jul 27, 2018
How many centimeters are there in one kilometer?
 
  a. 100
  b. 1,000
  c. 10,000
  d. 100,000
  e. 1106

Question 2

If we have the technology to transmit messages, then why can't we carry on a conversation with an alien civilization?
 
  What will be an ideal response?


Animal_Goddess

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

d

Answer to Question 2

Nature puts restrictions on travel through space, and it also restricts the possibility of communicating with distant civilizations by radio. One restriction is based on simple physics: Radio signals are electromagnetic waves and travel at the speed of light. Due to the distances between the stars, the speed of radio waves would severely limit humanity's ability to carry on normal conversations with distant civilizations. Decades could elapse between asking a question and getting an answer.


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