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Homework Help: Calculating Electric Charges

  1. Jul 14, 2009 #1
    1. The problem statement, all variables and given/known data
    The question lies in the equation, I do not understand where the SQRT of 3Q or the 2L^2 is coming from?

    Can somebody help me with this? The professor kinda breezed by this but I cannot find a valid explanation anywhere!

    Thanks in advance!

    Attached Files:

  2. jcsd
  3. Jul 14, 2009 #2
    It looks like they are breaking the electric field vector into its x and y components. Knowing a little bit of trig you get cos(30) = sqrt(3)/2 and sin(30) = 1/2.
  4. Jul 14, 2009 #3
    oh ok, see...i didn't take trig in HS :( I should have known better..oh well. thanks for the help.
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