# Uncertainty and Sig Figs

## Re: Uncertainty and Sig Figs

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

MattChequers

Posts : 47
Join date : 2013-02-25

## Re: Uncertainty and Sig Figs

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!

Hannah Koury

Posts : 2
Join date : 2013-01-09

## Re: Uncertainty and Sig Figs

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

MattChequers

Posts : 47
Join date : 2013-02-25

## Re: Uncertainty and Sig Figs

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 ?

tmcguckin

Posts : 9
Join date : 2013-01-29

## Re: Uncertainty and Sig Figs

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

MattChequers

Posts : 47
Join date : 2013-02-25

## Uncertainty and Sig Figs

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

tmcguckin

Posts : 9
Join date : 2013-01-29