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Author Question: Who originated the idea that planets go in ellipses around the sun? A) Copernicus B) Ptolemy C) ... (Read 54 times)

anshika

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on: Jul 29, 2018
Who originated the idea that planets go in ellipses around the sun?
 
  A) Copernicus B) Ptolemy C) Kepler D) Galileo E) Brahe

Question 2

An astronaut leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. The astronaut's destination is a star system 14.4 light-years away (one light-year is the distance light travels in one year).
 
  According to the astronaut, how long does the trip take? A) 14.4 y
  B) 22.7 y
  C) 9.34 y
  D) 15.0 y
  E) 4.20 y


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fur

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Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

E


anshika

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Reply #2 on: Jul 29, 2018
Thanks


fur

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Reply #3 on: Jul 29, 2018
Welcome :)


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