From: tjroberts137@sbcglobal.net   
      
   On 9/5/20 3:36 AM, PengKuan Em wrote:   
   > [...] in relativity time-rate changes when frame of reference   
   > changes. [...]   
      
   This is incorrect. Using standard English words as they apply to   
   physics, the "time-rate" is the same in every locally inertial frame --   
   it never "changes".   
      
        [It is best to avoid such wishy-washy phrases as "time   
         rate". Talk instead about definite, unambiguous, and   
         directly measurable quantities such as clock tick rates.]   
      
   Einstein's first postulate, solidly confirmed experimentally, implies   
   that clocks always tick at their usual (standard) rate, regardless of   
   where they are located or how they might be moving (because the laws of   
   physics that govern their ticking are the same). Since "Time is what   
   clocks measure [Einstein and others]", this also applies to "time rate".   
      
   The rest of your article is useless because it fails to recognize this   
   very basic and fundamental aspect of relativity.   
      
   Tom Roberts   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)