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Homework Help: Homework question needed because physics teacher doesnt want to help me

  1. Sep 3, 2012 #1
    1. The problem statement, all variables and given/known data
    An electron travels 1.68 m in 6.74 × 10−8 s.
    How fast is it traveling?
    Answer in units of m/s


    2. Relevant equations



    3. The attempt at a solution

    (1.68)/ (6.74 x 10 ^ -8) = 24925816.02

    i asked the teacher on this education facebook thingy for our school called edmodo if i was getting it right, teacher said he didn't understand what i meant by that :devil:. He didn't answer my second question, I'm now confused.
     
  2. jcsd
  3. Sep 3, 2012 #2
    Seems correct!!

    However, don't forget your units. This is very important as it will prevent you from making mistakes.

    What you should write is:

    [tex]\frac{1.68 m}{6.74\cdot 10 ^{ -8} s} = 24925816.02 \frac{m}{s}[/tex]
     
    Last edited: Sep 3, 2012
  4. Sep 3, 2012 #3
    so it is correct and my calculator isn't crazy? thankyou micro so much :D !! yes i won't forget my units! :)
     
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