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    hi there

    im basically doing a practice physics cwk at school, which is about investicating vibrations on a metal strip, and a it involves working out youngs modulus using a formula

    the last questions asks about justifiying my sf for E(ym) and im completely baffled?:confused:

    any help would be much appreaciated

    thanks
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      As you have used a formula, then the number of sig figs (indicating level of certainty/uncertainty) in the value you calculate from it, will depend on the uncertainties in the values you put in it.
      If those values have been measured in your experiment, then it will depend on the uncertainties in those measurements; and possibly the uncertainty in the slope of a graph you may have plotted using those measurements.
     
     
     
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