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Electrically neutral

  1. Jul 10, 2009 #1
    1. The problem statement, all variables and given/known data
    Consider an electrically neutral object. If this object is given a net positive charge does its mass increase, decrease or remain the same?


    2. Relevant equations



    3. The attempt at a solution
    i say that the mass decrease. but i don't know why, can someone please explain it to me
     
  2. jcsd
  3. Jul 10, 2009 #2

    mgb_phys

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    Then you can't really say that then can you?

    What positive and negative charged particles are there in an atom, which ones can be easily added/removed. To get a positive charge would you have to add or remove particles?
     
  4. Jul 10, 2009 #3
    You would have to Add particles.
     
  5. Jul 10, 2009 #4

    mgb_phys

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    No.
    Try answering each of the questions in the previous post
     
  6. Jul 10, 2009 #5

    negitron

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    It's a poorly-worded question because, in fact, the answer can be either increase OR decrease, but since I think adding hydrogen nucleii is probably not what the question is asking about, I think post #2 has the intent of the question correct.
     
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