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Satellite's question

  1. Dec 9, 2008 #1
    1. The problem statement, all variables and given/known data
    Two satellites, X and Y, are placed in orbit around a planet. Satellite X has period of revolution of 3.6x10^5s and an orbital radius of 7.5x10^8m. If the orbital radius of satellite Y is 3.0x10^9m, what is the orbital period?

    A) 9.1x10^5s
    B) 1.4x10^6s
    C) 2.9x10^6s
    D) 5.2x10^7s

    2. Relevant equations
    Kepler's third law equation:
    (T1/T2)^2 = (R1/R2)^2

    3. The attempt at a solution
    For this question what I did was use Kepler's third law and the answer I got was "B". But I was wondering is this correct because satellite X it says it has a "period of revolution of 3.6x10^5s", is this the same as "orbital period"?
  2. jcsd
  3. Dec 9, 2008 #2


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    Gold Member

    they are one and the same.
  4. Dec 9, 2008 #3


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    Homework Helper

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