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Homework Help: Error and significant figures when rounding?

  1. Nov 12, 2011 #1
    1. The problem statement, all variables and given/known data
    So I'm determining the specific heat capacity of brass for a lab report, when i initially measured temperature it was to two significant figures (this was the measurement with the least significant figures)

    My final answer, remarkably was 0.38 (j/g*K) but my error was 0.0235 so i rounded that to two significant figures, however doing that i get an answer of 0.38±0.024. This means that my highest and lowest measured value would be to three significant figures (0.38-0.024=0.356 (j/g*K)) see my problem?


    2. Relevant equations



    3. The attempt at a solution
    Should i round the error to the hundredths place or should i just leave my error as it is?
     
  2. jcsd
  3. Nov 13, 2011 #2

    ehild

    User Avatar
    Homework Helper

    You think it correctly, the error has to be rounded to 0.02.

    ehild
     
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