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The Physics PHYA2 thread! 5th June 2013 Watch

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    (Original post by Claree)
    Thanks!!! I understand now
    That is exactly what I said. ??? I am guessing you are still stuck. Ask again if you are.
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    (Original post by Jimmy20002012)
    This is a really stupid question but what are the rearrangements of the dsintheta=nlambda?


    Posted from TSR Mobile
    dSinTheta/n=lambda
    dSinTheta/lambda=n
    Sintheta=Nlambda/d
    d=nlambda/SinTheta
    think those are right
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    (Original post by jasmintaa)
    can someone please tell me how many significant figures we're meant to go to? Physics is so vague
    2 s.f. unless asked to give an appropriate s.f. which in that case you use the question to see how many s.f. they gave there figures to.
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    (Original post by masryboy94)
    2 s.f. unless asked to give an appropriate s.f. which in that case you use the question to see how many s.f. they gave there figures to.
    Thank you
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    (Original post by masryboy94)
    2 s.f. unless asked to give an appropriate s.f. which in that case you use the question to see how many s.f. they gave there figures to.
    2, don't they normally do 3?
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    (Original post by Qari)
    2, don't they normally do 3?
    nope its always been 2, well from ALL the past papers i've done, i've seen them ask it to be in 2 s.f.
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    (Original post by StalkeR47)
    That is exactly what I said. ??? I am guessing you are still stuck. Ask again if you are.
    Yeah, but some people don't understand wording. Just show them the equation and it's a whole lot simpler. that's how I understand majority of the time
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    (Original post by Qari)
    2, don't they normally do 3?
    ermagerd I dont know, I do all mine to 3 and then theyre always 2 Im confused
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    Not feeling as confident as I would like right now... But I suppose we will just see how it goes :P Good luck for tomorrow everyone!
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    (Original post by jasmintaa)
    dSinTheta/n=lambda
    dSinTheta/lambda=n
    Sintheta=Nlambda/d
    d=nlambda/SinTheta
    think those are right
    What about wavelength?


    Posted from TSR Mobile
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    (Original post by jasmintaa)
    ermagerd I dont know, I do all mine to 3 and then theyre always 2 Im confused
    word of advice, stick to 2 !
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    (Original post by masryboy94)
    nope its always been 2, well from ALL the past papers i've done, i've seen them ask it to be in 2 s.f.
    I think im gonna go for 2 and hope for the best
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    (Original post by masryboy94)
    nope its always been 2, well from ALL the past papers i've done, i've seen them ask it to be in 2 s.f.

    (Original post by jasmintaa)
    ermagerd I dont know, I do all mine to 3 and then theyre always 2 Im confused
    He's right, they're 2 s.f
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    (Original post by Jimmy20002012)
    What about wavelength?


    Posted from TSR Mobile
    Wavelength is lambda
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    (Original post by masryboy94)
    word of advice, stick to 2 !
    Have you got Jan 13 paper?
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    What is the derivation of dsinO=nL
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    (Original post by Qari)
    Have you got Jan 13 paper?
    go to page 31 on this thread, post 602 by stalker
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    (Original post by jasmintaa)
    I think im gonna go for 2 and hope for the best
    Ok here is the rule! There will be only one question where they will test you on the significant figures. For the rest of the question, look at the quantity they have given you. EG, 3.2x10^7kg is to 2 sf. This means they are looking for 2 s.f. answers. Is that ok?
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    (Original post by Jimmy20002012)
    What about wavelength?


    Posted from TSR Mobile
    wavelength is lambda so its the top one
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    (Original post by OliverG)
    What is the derivation of dsinO=nL
    what do you mean?
 
 
 
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