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6th Years and Leavers :: Chat Thread #1 watch

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  • View Poll Results: Highest Mark in the AH Maths Prelim :: YOUR BETS (Votes are public)
    namedeprived
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    Ape Gone Insane [No one's going to vote for me ]
    26.09%
    Me, I take AH Maths!
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    APE! You wasted your one chance of a poll...on THIS! NOOOOOO
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    (Original post by Ape Gone Insane)
    Yes I know that but it's not SNUBBLES or SNUBS!
    Okay, official name Paddington (obviously), colloquially known as Snubs.

    Spoiler:
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    Muchas gratias!
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    (Original post by CallumFR)
    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.
    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
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    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
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    (Original post by Ronar)
    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
    you get served at a pub?
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    (Original post by Ronar)
    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
    Have fun. I'll be thinking about you when I'm stuck in reading a book...:huff:
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    (Original post by Dado Prso)
    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 got 9.99 +- 0.26 m/s²
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    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. :o:
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    (Original post by TheUnbeliever)
    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. :o:
    Yes, it's for the LO3
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    (Original post by CallumFR)
    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!
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    (Original post by Meteorshower)
    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 :p: I don't recall ever being told that. Thanks for the correction
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    (Original post by CallumFR)
    pff :p: I don't recall ever being told that. Thanks for the correction
    I only found out three days before my investigation was due in!
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    (Original post by TheUnbeliever)
    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. :o:
    No there's different choices for the LO3. I remember seeing a whole sheet of them and one of the e/m experiments was on there. Measuring g is the most common probably because your teacher don't expect you to do it for the full project and it's also in unit 1.
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    (Original post by Meteorshower)
    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!
    :confused: We were told it is the same amount as the data it derived from.
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    (Original post by ukdragon37)
    :confused: We were told it is the same amount as the data it derived from.
    Actually now I think about it I may be confused...

    Ugh :p: 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?
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    :ninja:
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    (Original post by Ape Gone Insane)
    :awesome: which of you guys is Big Fat Man Boobs?

    :ninja:
    :confused:

    (Original post by Meteorshower)
    Actually now I think about it I may be confused...

    Ugh :p: 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?
    Looking back at past papers, it looks like it's more than 1 sig fig...
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    (Original post by ukdragon37)
    :confused:
    Presumably someone signed his guestbook under that name.
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    (Original post by TheUnbeliever)
    Presumably someone signed his guestbook under that name.
    Someone should sig a counter-advert advising people NOT to sign that guestbook.

    Include lines such as "damaging to your health" and "most likely a scam to steal money from inside your computer".

    Fear always sells
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    (Original post by ukdragon37)
    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.
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    (Original post by Meteorshower)
    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.
    I just happen to have a copy handy

    It looks like 1 sig. fig. is the amount most usually chosen but it does use other amounts in the booklet.
 
 
 
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