Uncertainty and Sig Figs

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Re: Uncertainty and Sig Figs

Post by MattChequers on Tue Apr 02, 2013 7:12 am

is the value you have a measurement? or did it come from a calculation?

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Re: Uncertainty and Sig Figs

Post by Hannah Koury on Tue Apr 02, 2013 12:32 am

just another question about sig figs, another value we have is 0.6190 and the uncertainty is 0.00005kg, should another zero be added? or is it okay to leave it like that? Thanks!

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Re: Uncertainty and Sig Figs

Post by MattChequers on Tue Apr 02, 2013 12:24 am

you just leave it as it is as if it were a given constant

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Re: Uncertainty and Sig Figs

Post by tmcguckin on Mon Apr 01, 2013 11:56 pm

So in that case would we round our value to have only 1 significant digit or would I leave it as it is and just say plus/minus 0 kg ?

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Re: Uncertainty and Sig Figs

Post by MattChequers on Mon Apr 01, 2013 11:31 pm

You can take the mass of the disk with zero uncertainty.

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Uncertainty and Sig Figs

Post by tmcguckin on Mon Apr 01, 2013 11:10 pm

The mass indicated on our disk was written on the disk to be 0.6190 kg. We have an uncertainty of 0.00005 kg. In this case we would need to add another 0 in order to make the mass have the correct number of significant figures. One time we had lost a mark for significant figures for adding another 0 asking us how did we know that. Should we be adding another 0 at the end of 0.6190 or not?
Thanks

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