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Age of earth

  1. Jan 5, 2012 #1
    Hi,

    Age of earth is equal to

    1. A solar day
    2. A lunar day
    3. An astronomical day
    4. None of these

    Which is the correct one and how?
     
  2. jcsd
  3. Jan 5, 2012 #2

    phinds

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    Do you have any idea how old the earth is?
     
  4. Jan 5, 2012 #3
    According to my book:

    1.4 x 107 s
     
  5. Jan 5, 2012 #4

    phinds

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    and do you have any idea how long each of those other things is?
     
  6. Jan 5, 2012 #5
    It's approximate value. nope, I don't have any idea about this.

    That's why I asked it here !
     
  7. Jan 5, 2012 #6

    phinds

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    perhaps you would find it informative to look them up.
     
  8. Jan 5, 2012 #7

    SammyS

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    I suggest getting a different book.

    The age of the Earth is on the order of 4.5✕109 years .
     
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