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Simply cannot get my calculator to give me the correct answer?

  1. Oct 12, 2011 #1
    Simply cannot get my calculator to give me the correct answer!?

    1. The problem statement, all variables and given/known data

    I'm going through a worked example I did in a tutorial and cannot get the same answer we did in class with my calc!?


    2. Relevant equations

    Damping ratio = the square root of E2 / 4∏2 n2 E2

    Where E=2.526 n=2

    3. The attempt at a solution

    I'm getting 0.0796 , doing 4x(pie2) and 0.0398 doing (4xpie)2

    The answer from tutorial is 0.1971 and is deffinately correct.

    I've broken each bit down and worked it out separately and put it into the calc then in the simplified way but still I'm not getting the right answer :(
     
  2. jcsd
  3. Oct 12, 2011 #2

    Doc Al

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    Staff: Mentor

    Re: Simply cannot get my calculator to give me the correct answer!?

    Can you retype that equation, using parentheses as needed. It looks like you have E2 twice.
     
  4. Oct 12, 2011 #3
    Re: Simply cannot get my calculator to give me the correct answer!?

    Yeah that what I've got written down in my notes. Maybe I copied it down wrong?
     
  5. Oct 12, 2011 #4

    Doc Al

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    Staff: Mentor

    Re: Simply cannot get my calculator to give me the correct answer!?

    You must have. You have an E2 in numerator and denominator, which would cancel out. (I doubt that's what was meant.)
     
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