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Clarification on the scope of control masses

  1. Jan 12, 2016 #1
    I understand that Thermodynamics studies systems at the macroscopic level, but I am still somewhat confused with respect to closed/isolated systems. Does nuclear radiation still count as a control volume? Our instructor asked if the ISS was technically a closed/open system. Would the constant flux of radiation even be considered?
  2. jcsd
  3. Jan 12, 2016 #2


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    Depends. Long run, open system. Short term? Maybe, maybe not. How sensitive is your mass measurement?
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