XPost: alt.usage.english   
   From: peter@pmoylan.org   
      
   On 20/09/24 19:30, Helmut Richter wrote:   
      
   > I like much more those thumb rules that actually allow you to estimate orders   
   > of magnitude, e.g.:   
   >   
   > 1 year ≅ π · 10⁷ sec ≅ 31415926.54 sec   
   >   
   > or   
   >   
   > 1 year ≅ √10 · 10⁷ sec ≅ 31622776.60 sec   
   >   
   > or, only for those wanting more precision, the arithmetic mean of the two   
   > which has three leading digits correct.   
      
   The one non-metric measurement that I find useful is "one foot per   
   nanosecond".   
      
   --   
   Peter Moylan       peter@pmoylan.org    http://www.pmoylan.org   
   Newcastle, NSW   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)