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Homework Help: Prove earth is round

  1. Aug 13, 2008 #1
    1. The problem statement, all variables and given/known data
    Can you prove the earth is round by mathematical equation?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Aug 13, 2008 #2


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    Is this really a homework question? If so, you should fill in sections 2 and 3 of the homework posting template.
  4. Aug 13, 2008 #3


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    Obviously not. The earth being flat is not inconsistent with mathematics. You have to make a physical observation.
  5. Aug 14, 2008 #4
    Define "round" it's sort of ambiguous
  6. Aug 14, 2008 #5


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  7. Aug 14, 2008 #6
    The Earth is actually closer to an oblate spheroid (if I have it right)...yes, this can be shown mathematically.
  8. Aug 14, 2008 #7


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    Probably not since the earth is not round. :wink:

    It has a buldge at the equator...too many donuts.

  9. Aug 14, 2008 #8
    yea use the formula for the surface area of a sphere 4pi*r2. Then compare it to the actual surface area of the earth. you will see that the numbers do not match proving earth is flat :D
  10. Aug 14, 2008 #9
    Put simply one could observe that it is possible to circumnavigate the globe, or leave the Earth in a spaceship without seeing the edge. It's not difficult.

    And yes, you can't prove that the Earth is round through mathematics, you have to show an observation.
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