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Homework Help: Conservation of matter, mass, rest mass and energy

  1. Oct 29, 2014 #1
    1. The problem statement, all variables and given/known data

    Could someone please let me know if this is correct? I'm unsure about matter always being conserved, does it change whether we're talking about Newtonian physics or special relativity? To me, matter is conserved regardless but maybe there is something I don't know? Thank-you.

    Is matter always conserved? Is mass always conserved? Is rest-mass always conserved? Is energy always conserved?

    2. Relevant equations

    3. The attempt at a solution

    Matter is always conserved
    Mass (inertia) is always conserved
    Rest-mass is not always conserved
    Energy is always conserved
  2. jcsd
  3. Oct 29, 2014 #2


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