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  1. gravityripple

    Other Advice on Adult's Path Towards PhD in Mathematical Physics

    Hello, I've read a few of the responses in the guidance section on this site and had some conversations with guidance personnel at my college, but I was hoping to get some other, potentially more objective insights from the group here. I will be 34 this year and am currently a sophomore at a...
  2. gravityripple

    Newton's Third Law -- Normal vs. Tensile as Opposite of mg?

    Hello, I am returning to college after a ten year hiatus and am taking an online course on edx to try and refresh my knowledge a bit before the fall. I read a few other posts on Newton's Third law, but it seems I am falling short on this one concept. In the case of an object, m_1, which is at...