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    xMerlina's Avatar
    xMerlina Posts: 38, Reputation: 1
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    #1

    Mar 8, 2011, 09:35 PM
    Coulomb's Equation
    A clown carries two mylar balloons that rub against the circus giraffe, causing the balloons to separate. Each balloon acquires 6.2×10-7 C of charge. How large is the electric force between them when they are separated by a distance of 27 cm?

    I know it uses Coulomb's Equation, but I can't seem to get the answer. Would it be 9e9(6.2e-7)(6.2e-7)/(.27^2)?
    jcaron2's Avatar
    jcaron2 Posts: 986, Reputation: 204
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    #2

    Mar 8, 2011, 09:57 PM
    Yeah, that appears to be correct. How do you know your answer is wrong? I get 0.047 N for the force.
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Mar 8, 2011, 10:40 PM

    Field? You mean force and in Newtons I hope :)
    jcaron2's Avatar
    jcaron2 Posts: 986, Reputation: 204
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    #4

    Mar 9, 2011, 03:05 PM
    Doh! I'm sure glad there's an edit button! :o
    xMerlina's Avatar
    xMerlina Posts: 38, Reputation: 1
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    #5

    Mar 9, 2011, 03:25 PM
    Comment on jcaron2's post
    I got .047 N too, but it says that it's wrong!
    xMerlina's Avatar
    xMerlina Posts: 38, Reputation: 1
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    #6

    Mar 9, 2011, 03:48 PM
    Comment on jcaron2's post
    Never mind, I got it. I had to round to .0475
    jcaron2's Avatar
    jcaron2 Posts: 986, Reputation: 204
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    #7

    Mar 9, 2011, 07:05 PM

    Good. I'm glad that mystery is cleared up. :)
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