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Homework Help: Electric field magnitude midway between 2 charges

  1. Dec 15, 2013 #1
    1. The problem statement, all variables and given/known data

    What is the electric field magnitude midway between charges of Q1 = 1 C and Q2 = 11 C separated by 2 m?

    2. Relevant equations
    E= k (Q/r^2).

    3. The attempt at a solution
    9E9 x 1C / 1^2 = 9E9 N/C
    9E9 x 2C / 1^2= 1.8E10 N/C.

    What do I do from here? Any help would be much appreciated thanks!!!
  2. jcsd
  3. Dec 15, 2013 #2
    Would the answer be to add my two final values? I would have 2.7E10 N/C as my final answer... Does this look right?
  4. Dec 15, 2013 #3
    That answer above proves to be not correct. What needs to be changed?!
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