Advertisement
Help Keep Boards Alive. Support us by going ad free today. See here: https://subscriptions.boards.ie/.
If we do not hit our goal we will be forced to close the site.

Current status: https://keepboardsalive.com/

Annual subs are best for most impact. If you are still undecided on going Ad Free - you can also donate using the Paypal Donate option. All contribution helps. Thank you.
https://www.boards.ie/group/1878-subscribers-forum

Private Group for paid up members of Boards.ie. Join the club.

*** Leaving Cert PHYSICS 2014 ***

1…5681011…13

Comments

  • #212
    LoveLamps
    Registered Users, Registered Users 2 Posts: 781 ✭✭✭LoveLamps


    What derivations should i learn?


  • #213
    Teachm
    Registered Users, Registered Users 2 Posts: 45 ✭Teachm


    deadpixel wrote: »
    Real world physics has l in metres on y-axis vs 1/f (f/hz) Straight line, not through the origin as y-intercept is -.3d as stated above. Slope would be c/4 though from the formula c =4f(l+.3d)
    I'd say we're more to just be asked to figure it p
    out from the formula if the experiment does come up but good to know just in case.



    This is correct.l on y axis versus 1 over f and slope x4 = c
    Plmko also correct if lambda on y axis versus 1 over f then slope = c

    Did see it on a mock but think it a bit nasty if it came up however deadpixel is right to say better safe than sorry.


  • #214
    otpmb
    Registered Users, Registered Users 2 Posts: 84 ✭✭otpmb


    Daithi MacG wrote: »
    ...Getting that Kepler's Law is the hardest for me...I don't know what's going on when I try to do it, I just plug everything in everywhere.

    What is Kepler's Law?


  • #215
    Teachm
    Registered Users, Registered Users 2 Posts: 45 ✭Teachm


    LoveLamps wrote: »
    What derivations should i learn?

    Equations of motion
    nlambda=dSin theta
    F=qvB (electromag)
    Resistors in series and parallel

    The rest are in SHM and circular motion for the applied Maths students or those who love mechanics


  • #216
    flump_master
    Closed Accounts Posts: 89 ✭✭flump_master


    otpmb wrote: »
    What is Kepler's Law?

    It's T^2= [4(pi^2)(r^3)]/GM

    You get it by equating centripetal force and gravity and letting w^2= 4(pi^2)/T^2


  • Advertisement
  • #217
    Days 298
    Closed Accounts Posts: 1,301 ✭✭✭Days 298


    Ive ignored Kepler and angular velocity. I know it but havent recently gone over it. Dont think itll come up tomorrow as it a question on planets came up last year IIRC. Either Hooke or SHM.


  • #218
    forlifebaby
    Registered Users, Registered Users 2 Posts: 31 ✭forlifebaby


    Lara_15 wrote: »
    I thought physics was first, then accounting

    Oh holy mother of God. Is it??


  • #219
    Teachm
    Registered Users, Registered Users 2 Posts: 45 ✭Teachm


    forlifebaby wrote: »
    Oh holy mother of God. Is it??

    Physics in morning


  • #220
    forlifebaby
    Registered Users, Registered Users 2 Posts: 31 ✭forlifebaby


    Isitthough? wrote: »
    Lol your fine for accounting then, do you know ratios? Im fine with everything but Im a bit dodgey on cash flows for some reason:( I dont know ratios and dont know whether I should do them I did them before but a long time ago...
    Oh and as Lara said Physics is 1st then accounting :p

    I don't know my theory and that's the sad bit..now that I know we have accounting second I will just learn it during the break.

    I am not doing ratio. I know the formula and all. But I only ever get max 85/100 in it. So I am better off knowing the rest. If you know the other 100 markers you should be okay. :) Is published likely to come up this year? It has come up twice in a row before. -.- I just realised that I haven't learned the notes bit on it.

    Ugh.


  • #221
    Isitthough?
    Registered Users, Registered Users 2 Posts: 192 ✭✭Isitthough?


    forlifebaby wrote: »
    I don't know my theory and that's the sad bit..now that I know we have accounting second I will just learn it during the break.

    I am not doing ratio. I know the formula and all. But I only ever get max 85/100 in it. So I am better off knowing the rest. If you know the other 100 markers you should be okay. :) Is published likely to come up this year? It has come up twice in a row before. -.- I just realised that I haven't learned the notes bit on it.

    Ugh.
    It never came up twice in a row cheaking from 1997...You almost gave me a heartattack :....I didn't get time to do the ratio's shame really Im actually good at accounting I just didn't plan well..Hopefully all the good stuff will come up and I Dont know theory either but some of it is fine and you get attempt marks for common sense Ill just read through some tomorrow.


  • Advertisement
  • #222
    kn2k10
    Registered Users, Registered Users 2 Posts: 119 ✭✭kn2k10


    Well.. I'm ready to fail this **** exam.


  • #223
    Isitthough?
    Registered Users, Registered Users 2 Posts: 192 ✭✭Isitthough?


    kn2k10 wrote: »
    Well.. I'm ready to fail this **** exam.

    Im actually ****ing bricks at this stage Im so scared Ill fail and if I fail this Ill most likely have to repeat:( I really hope its a nice exam


  • #224
    Aspiring
    Registered Users, Registered Users 2 Posts: 2,204 ✭✭✭Aspiring


    Lads, what's the point worrying and saying how badly you're going to do on here, go cram.


  • #225
    kn2k10
    Registered Users, Registered Users 2 Posts: 119 ✭✭kn2k10


    Aspiring wrote: »
    Lads, what's the point worrying and saying how badly you're going to do on here, go cram.

    I haven't been able to 'cram' for the last two years. Physics makes no sense to me. I was falsely lead to believe that it was a fun practical subject, not another maths subject.
    **** teacher doesn't help either, he didn't even finish the course, but I won't rant.


  • #226
    Aspiring
    Registered Users, Registered Users 2 Posts: 2,204 ✭✭✭Aspiring


    kn2k10 wrote: »
    I haven't been able to 'cram' for the last two years. Physics makes no sense to me. I was falsely lead to believe that it was a fun practical subject, not another maths subject.
    **** teacher doesn't help either, he didn't even finish the course, but I won't rant.

    The whole course material and syllabus are available online. In much more detail than any textbook or teacher will ever have.


  • #227
    Isitthough?
    Registered Users, Registered Users 2 Posts: 192 ✭✭Isitthough?


    Aspiring wrote: »
    Lads, what's the point worrying and saying how badly you're going to do on here, go cram.

    Cramming atm Ill do it till 12 then going to bed Studying till 4 am wont work for me:p


  • #228
    kn2k10
    Registered Users, Registered Users 2 Posts: 119 ✭✭kn2k10


    Stupid question, can you pass using the log tables? Lol

    Also it's a bit late for any new course material now, sorta wish I knew that earlier.


  • #229
    AtomicKoala
    Registered Users, Registered Users 2 Posts: 881 ✭✭✭AtomicKoala


    aleatorio wrote: »
    Ok, cos the one we learned was the mechanical one, so Ill just learn the electrical too just in case :o

    The mechanical one? :eek: What's that? Is it using hot copper or something? :confused:


  • #230
    aleatorio
    Registered Users, Registered Users 2 Posts: 1,673 ✭✭✭aleatorio


    AtomicKoala wrote: »
    The mechanical one? :eek: What's that? Is it using hot copper or something? :confused:

    Yeah you heat a lump of metal up in a water bath :P


  • #231
    AtomicKoala
    Registered Users, Registered Users 2 Posts: 881 ✭✭✭AtomicKoala


    aleatorio wrote: »
    Yeah you heat a lump of metal up in a water bath :P

    What are we, Archimedes? :pac:


  • Advertisement
  • #232
    Lara_15
    Registered Users, Registered Users 2 Posts: 704 ✭✭✭Lara_15


    AtomicKoala wrote: »
    The mechanical one? :eek: What's that? Is it using hot copper or something? :confused:
    yes please share your knowledge, I only know the joulemeter one


  • #233
    sirwhy
    Registered Users, Registered Users 2 Posts: 16 ✭sirwhy


    I finished up study there. Get a good sleep in and do some in the morning before the exam. I've found study in the morning to be most helpful


  • #234
    ave123
    Registered Users, Registered Users 2 Posts: 91 ✭✭ave123


    anyone have any final experiment/derivation predictions before tomorrow?


  • #235
    Janeh9
    Registered Users, Registered Users 2 Posts: 111 ✭✭Janeh9


    I've been doing pass since March but I'm pretty certain there is no difference so I'm taking the honours paper tomoro :P


  • #236
    Teachm
    Registered Users, Registered Users 2 Posts: 45 ✭Teachm


    Last min advice.
    Go in and do section a first.dont look at section b till your 3 exp q are done
    CHOOSE YOUR Questionscarefully
    If you are using a formula for a definition,explain what each letter means.
    Make sure you answer every part of q

    Use every min of three hours

    Good luck again


  • #237
    aleatorio
    Registered Users, Registered Users 2 Posts: 1,673 ✭✭✭aleatorio


    G by freefall, latent heat of vaporisation/fusion, snells law/speed of sound/wavelength of light/sonometer and Joules law/Resisitivity
    Induction, SHM, Nuclear reactions, Pair production/annihilation and a nice Q5

    Hopefully I'll get some of this :o


  • #238
    Cakes.
    Registered Users, Registered Users 2 Posts: 2,152 ✭✭✭Cakes.


    Ah gad I'm doomed! Know nothing!


  • #239
    Daniel2590
    Registered Users, Registered Users 2 Posts: 1,645 ✭✭✭Daniel2590


    What a beautiful paper <3 fairly confident for an A1 :D


  • #240
    qweerty
    Closed Accounts Posts: 367 ✭✭qweerty


    Daniel2590 wrote: »
    What a beautiful paper <3 fairly confident for an A1 :D

    I got an A1, but I remember coming on here afterwards and having people like you depress me like hell! :D Glad it went well fo you. Were there any interesting Qs? Joule's Law? What did Q6 involve?


  • Advertisement
  • #241
    Daniel2590
    Registered Users, Registered Users 2 Posts: 1,645 ✭✭✭Daniel2590


    Joules law, conservation of momentum, speed of sound in air and snells law were the experiments. Q6 had derivation of F=ma, difference between vectors and scalars, then the calculation was based on a golf ball being hit (find initial speed and Max height)


Advertisement