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What is noted by +_5 in measuring cylinder?

  1. Jul 5, 2013 #1
    can anyone explain why is that noted?Most of them says that it denotes the error.why there should be an error in the instrument.Can't we make an instrument free of error?confused.
     
  2. jcsd
  3. Jul 5, 2013 #2

    Borek

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    Staff: Mentor

    No..
     
  4. Jul 5, 2013 #3

    symbolipoint

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    How accurately can the practical, graduated, vertical number line be read? Free of Error is impossible.
     
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