From: tjroberts137@sbcglobal.net   
      
   On 8/5/18 12:24 AM, Sylvia Else wrote:   
   > On 5/08/2018 10:28 AM, Luigi Fortunati wrote:   
   >> I entered the elevator, I placed an electronic scale on the floor and,   
   >> after starting, when the elevator bought steady speed uphill, I weighed   
   >> myself and the display showed 83.5 kg.   
   >>   
   >> I repeated the operation during the descent at constant speed and the   
   >> display showed a weight of 83.2 kg.   
   >>   
   >> Is it a strange result or does it correspond to the theory?   
   >   
   > I corresponds with the fact that electronic scales results are not   
   > particularly reproducible, with a variation between measurements that is   
   > less than 1% being not at all surprising. Vibration, muscle twitches,   
   > etc. all contribute.   
      
   Yes. Typical bathroom scales are rather limited in accuracy. I suspect   
   his scale will vary by at least that 0.3 kg, weighing the same object   
   multiple times.   
      
   Using my electronic scale, when I weigh myself five times in a row the   
   results vary by typically 0.4 or 0.6 pounds (the resolution of the   
   display is 0.2 pounds). Moreover, I must weigh something else between   
   measurements, because it clearly remembers the previous value and   
   settles to it very quickly. So between weighings I sit down and measure   
   just my legs. If I attempt to weigh myself standing on tip-toe, it   
   usually times out with an error, because I cannot hold myself steady enough.   
      
   	(Experimental physicists apply their knowledge and   
   	 experience to everything.)   
      
   Tom Roberts   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)