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Significant digits

  1. Jan 30, 2009 #1
    1. The problem statement, all variables and given/known data

    Suppose you conduct an experiment in which you find a certain measurement to be 0.1mm. We have already discussed in class that this number contains 1 significant digit (the "1" to the right of the decimal), but how many times would you have to conduct the experiment in order to know the next significant digit?

    2. Relevant equations

    Significant digits

    3. The attempt at a solution

    My initial guess is that you would have to conduct the experiment 100 times because the next significant digit would be in the hundredths place. Is my reasoning correct?
     
  2. jcsd
  3. Jan 30, 2009 #2
    The accuracy of your measurement is only as good as the measuring instrument. For example, if you had a meter stick with no numbers but knew the stick was one meter, each measurement you made would be no more accurate than a meter no matter how many times the measurement was made.
     
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