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B Why is there no prefix for 10^5,10^-5 and 10^4 and 10^-4?

  1. May 13, 2016 #1
    or, why was one never adopted?
     
  2. jcsd
  3. May 13, 2016 #2
    Just a convention? 10^3 a time?
     
  4. May 13, 2016 #3

    fresh_42

    Staff: Mentor

    Myria for ##10^4## and dimi for ##10^{-4}## have been in use in France until the middle of the 20th century.
    Today we use potentials of ##10## until ##1000## and then potentials of ##1000## which makes sense to cover the different orders we face. For everyday life we still have the small ones plus some special terms like hectares or acres.
     
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