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Author Question: A spaceship of mass m circles a planet (mass = M) in an orbit of radius R. How much energy is ... (Read 179 times)

lidoalex

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on: Jul 28, 2018
A spaceship of mass m circles a planet (mass = M) in an orbit of radius R. How much energy is required to transfer the spaceship to a circular orbit of radius 3R?
 a. GmM/(2R)
  b. GmM/(3R)
  c. GmM/(4R)
  d. GmM/(6R)
  e. 3GmM/(4R)

Question 2

An asteroid revolves around the Sun with a perihelion 0.5 AU and an aphelion of 7.5 AU. What is its period of revolution?
 a. 4 years
  b. 8 years
  c. 16 years
  d. 32 years
  e. 64 years


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katkat_flores

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

B

Answer to Question 2

B


lidoalex

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Reply 2 on: Jul 28, 2018
Excellent

bulacsom

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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