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MCAT Physics Thought Question...

Discussion in 'MCAT Discussions' started by chandler742, Aug 13, 2002.

  1. chandler742

    chandler742 Senior Member
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    Here is another question.


    What is 1 light year approximately?

    A) 1 x 10 ^10 secs
    B) 1 x 10 ^10 meters
    C) 1 x 10 ^15 secs
    D) 1 x 10 ^ 15 meters


    (HINT: Don't forget on the MCAT you must know how to
    approximate exponents)
     
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  3. Mr. Z

    Mr. Z Senior Member
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    365 x 24hr/dayx3600sec/hr = 3.2x10^8 sec in a year

    (3.2x10^8) x (3x10^8) = 9x10^16 or ~1x10^15

    answer D
     
  4. freakazoid

    freakazoid Guy Friend Extraordinaire
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    I second that.
     
  5. rCubed

    rCubed taiko master
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  6. dark_scientist

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    The time is 3.2e7 not 3.2e8, which when multiplied by the speed of light (3e8) is 9e15 = ~1e16, which is not one of the answer choices. Did I do a calculation wrong or is the answer choice supposed to be 1e16?
     
  7. chandler742

    chandler742 Senior Member
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    right. Good job, guys.

    As an aside, this appeared on my MCAT as a free response question. I fabricated the wrong values, but the meters and sec were scattered as choices.
     

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