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   sci.physics.research      Current physics research. (Moderated)      17,516 messages   

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   Message 16,317 of 17,516   
   richalivingston@gmail.com to Luigi Fortunati   
   Re: The weight in the elevator   
   06 Aug 18 19:11:24   
   
   On Sunday, August 5, 2018 at 3:01:36 AM UTC-5, Luigi Fortunati wrote:   
   > I was careful to weigh *after* the initial acceleration and *before* of   
   > the final deceleration, both uphill and downhill.   
   >   
   > Furthermore, my electronic scale is very tested.   
   >   
   > Since the experiment is reproducible easily, I invite everyone to repeat   
   > it personally in their lifts and to report their results here.   
      
   Many scales show some hysteresis, and this result is consistent with   
   that. When going up the "weight" will be high during acceleration and   
   then go back to normal, giving a slightly high result.  When going down   
   the "weight" will be low and then go back to normal, giving a slightly   
   low result.   
      
   You also don't state what precision and uncertainty your scale gives.   
   Did you make these measurements many times?  Do you know how   
   consistently you get exactly these results?  The significance of your   
   measurements depends critically on those properties of your scale.   
      
   Rich L.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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