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  1. Jun 20, 2017 #1
    I am a chemistry teacher. In summer time I can also dedicate some time to my first passion, that is physics. My first concern and thread is about "time arrow".
     
  2. jcsd
  3. Jun 20, 2017 #2

    berkeman

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    Staff: Mentor

    Welcome to the PF, Alfredo. :smile:
     
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