6th Years and Leavers :: Chat Thread #1

Yes I know that but it's not SNUBBLES or SNUBS!

I'm using $T = 2\pi \sqrt \frac{L}{g}$ and then rearranging to get get $\frac{T^2}{L} = gradient = \frac{4\pi^2}{g}$ and then just solving for g.

Haha, i'm in a friends getting ready to go to the pub and i still manage to go on this is that sad ahaha

Haha, i'm in a friends getting ready to go to the pub and i still manage to go on this is that sad ahaha

for my uncertainties i worked out the random uncertainty in T and i worked out the gradient uncertainty using some equation.

what value of g did you get? i got a miserable 10.32m/s²

I wonder if that experiment is the only choice for the LO3 (which is what this is, right?) because it's what we did last year, too.

I got 9.99 +- 0.26 m/s²

Uncertainty only goes to one sig fig, and your value for g gets rounded off at what unit that is.

So it's 10 +- 0.3 m/s^2

Sorry if that sounds far less accurate, but that's what you have to do!

pff I don't recall ever being told that. Thanks for the correction

I wonder if that experiment is the only choice for the LO3 (which is what this is, right?) because it's what we did last year, too.

Uncertainty only goes to one sig fig, and your value for g gets rounded off at what unit that is.

So it's 10 +- 0.3 m/s^2

Sorry if that sounds far less accurate, but that's what you have to do!

We were told it is the same amount as the data it derived from.

which of you guys is Big Fat Man Boobs?

Actually now I think about it I may be confused...

Ugh My head can't think about it properly... I know that the uncertainty is only quoted to 1 sig fig though.. I'm fairly sure?

Presumably someone signed his guestbook under that name.

Looking back at past papers, it looks like it's more than 1 sig fig...

I was told to always quote the final uncertainty value to one significant figure for investigations/other crap, and the final value to the unit this uncertainty is in. I realise you can have other ones but that's just what I was told/think I read somewhere. What I think this effectively means is do all the calculations with as many figures as you want but leave it at 1 for the final value

Looking at my investigation i've done that every time...

CallumFR, i would suggest looking for a copy of "uncertainties in physics" at your school, it's the one they base what you should do from. See what that says, if I'm wrong fair enough, but I'm pretty confident this was at least what my physics teacher said to do.