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Homework Help: Topic about masses (modern physics)

  1. Apr 3, 2008 #1
    1. The problem statement, all variables and given/known data
    If a system is composed of n particles that are freely moving is M(system)=M(total masses of particles)(sum)

    2. Relevant equations

    3. The attempt at a solution

    of course no , but these particles isnt photons or electrons my doctor didnt exacly told me what are they so how can i proove the answer is no PLEASE GIVE ME HINTS
  2. jcsd
  3. Apr 3, 2008 #2


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    Homework Helper

    What is the rest of the question?
  4. Apr 3, 2008 #3
    this is the question >>
  5. Apr 3, 2008 #4


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    If you think the answer is no, then you can pick whatever particle type you want and answer to show the statement is wrong. You just want a counterexample. Photons are a good choice.
    Last edited: Apr 4, 2008
  6. Apr 4, 2008 #5
    thank you, you really helped me how to think about the problem.....
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