Sig Figs and Indeterminacy 1.45

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Sig Figs and Indeterminacy 1.45

Postby SubparChemist » Sun Oct 04, 2015 4:45 pm

1.45 A bowling ball of mass 8.00 kg is rolled down a bowling alley lane at 5.00 plus/minus 5.0 m per sec. What is the minimum uncertainty in its position?

Should I ignore the fact that sig figs of the variance/spread is two and just stick with the three sig figs the two other values use? I'm just unclear on whether we would regard the variance's sig figs to be as important as the other values' sig figs.

Thanks in advance.

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Re: Sig Figs and Indeterminacy 1.45

Postby Chem_Mod » Mon Oct 05, 2015 7:19 pm

You should only ignore sig figs if the quantity is considered exact. Other than that, if you use the number in a calculation, then you should account for its sig figs.

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