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***JC 2014 Science - Thu. June 12th 2014 - all levels***

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13

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    #62
    ElmW13
    Registered Users Posts: 188 ✭✭ElmW13


    I halved the diameter to get the radius. Used the circumference formula and then divided it by metres per second


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    #63
    polkadot7
    Registered Users Posts: 14 ✭polkadot7


    luimneachabu wrote: »
    What was the general name for the liquid in the beaker in the distillation experiment?

    Distillate


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    #64
    DanielChester
    Registered Users Posts: 53 ✭✭DanielChester


    ElmW13 wrote: »
    I halved the diameter to get the radius. Used the circumference formula and then divided it by metres per second

    A formula wasn't needed. You were never given the diameter. You were given the radius for part (i) in order to calculate the work when the ferris wheel goes from the bottom to the top. Think about it logically. Bottom -> top is half a circle == radius.


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    #65
    coolerboy
    Registered Users Posts: 589 ✭✭✭coolerboy


    T=D÷S
    240÷.25
    960 secs
    16 mins

    60×4=240

    Anyone else get this


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    #66
    Herrenvolk
    Registered Users Posts: 3 ✭Herrenvolk


    Well that exam was ****, for biology.


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    #67
    Herrenvolk
    Registered Users Posts: 3 ✭Herrenvolk


    Gerrymandering reborn wrote: »
    But this wasn't a maths paper now was it?

    Bit harsh


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    #68
    MissCupcake
    Registered Users Posts: 204 ✭✭MissCupcake


    what was the hydroelectricity?


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    #69
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    Gerrymandering reborn wrote: »
    But this wasn't a maths paper now was it?

    Yes, obviously not.
    I'm just saying I didn't think you'd need the formula for circles in a Science exam. ;)

    I'm not too bothered anyway, think I ruled out my chances for an A after the Physics section.


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    #70
    Scrublord420
    Registered Users Posts: 27 ✭Scrublord420


    Liordi wrote: »
    Yes, obviously not.
    I'm just saying I didn't think you'd need the formula for circles in a Science exam. ;)

    I'm not too bothered anyway, think I ruled out my chances for an A after the Physics section.

    Physics was the part that most people were confident about


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    #71
    jenbar09
    Registered Users Posts: 9 ✭jenbar09


    Scrublord420 wrote: »
    Physics was the part that most people were confident about

    Really?? I thought that part was the hardest. Biology was fine though.


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    #72
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    Scrublord420 wrote: »
    Physics was the part that most people were confident about

    Ah, Bio & Chem have always been my favourite.
    I've always been a bit dodgy on Physics.


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    #73
    coolerboy
    Registered Users Posts: 589 ✭✭✭coolerboy


    MissCupcake wrote: »
    what was the hydroelectricity?

    the sun evaporates the ocean water, and rains it on top of a moutain. then melts it so the water flows downstream, and that water will push the turbine that turnes it into energy


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    #74
    Chloee98
    Registered Users Posts: 27 ✭Chloee98


    coolerboy wrote: »
    T=D÷S
    240÷.25
    960 secs
    16 mins

    60×4=240

    Anyone else get this

    I got 16 minutes


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    #75
    KarlF32
    Registered Users Posts: 3 ✭KarlF32


    Pretty Easy Exam, got a bit stuck on Chemistry though. Predicting A/B :)


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    #76
    Scrublord420
    Registered Users Posts: 27 ✭Scrublord420


    Can someone tell me what biofuel is please? I got stuck on that question about how the sun helps biofuel or something


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    #77
    smiles_1998
    Registered Users Posts: 336 ✭✭smiles_1998


    That was the worst Science exam ever...the physics section was sooo weird. What did people say for the biofuel and hydroelectricity question?

    Biology was grand enough though and Chemistry was okay...


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    #78
    yaEHya
    Registered Users Posts: 114 ✭✭yaEHya


    Was the first question animal or plant?


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    #79
    Mr Rhode Island Red
    Registered Users Posts: 746 ✭✭✭Mr Rhode Island Red


    Scrublord420 wrote: »
    Can someone tell me what biofuel is please? I got stuck on that question about how the sun helps biofuel or something

    I think it's energy got from rotting plant materiel. Hydroelectricity is wave energy

    For the ferris wheel, did it want us to calculate the work done bringing the person directly from base to top (a distance of 120 metres) or did it want us to calculate the work done bringing the person from the base to the top via going around half the ferris wheel (circle formula for radius 60 and then halving the answer)

    I saw it as the latter personally


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    #80
    coolerboy
    Registered Users Posts: 589 ✭✭✭coolerboy


    yaEHya wrote: »
    Was the first question animal or plant?

    Plant because of the vacuoles


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    #81
    coolerboy
    Registered Users Posts: 589 ✭✭✭coolerboy


    smiles_1998 wrote: »
    That was the worst Science exam ever...the physics section was sooo weird. What did people say for the biofuel and hydroelectricity question?

    Biology was grand enough though and Chemistry was okay...

    Hydroelectricity -the sun evaporates the ocean water, and rains it on top of a moutain. then melts it so the water flows downstream, and that water will push the turbine that turnes it into energy.
    Biomass→photosynthesis of plant requires the sun.


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    #82
    Scrublord420
    Registered Users Posts: 27 ✭Scrublord420


    coolerboy wrote: »
    Hydroelectricity -the sun evaporates the ocean water, and rains it on top of a moutain. then melts it so the water flows downstream, and that water will push the turbine that turnes it into energy.
    Biomass→photosynthesis of plant requires the sun.

    Yes thanks i got the hydroelectricity one like that


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    #83
    tedobrien98
    Registered Users Posts: 231 ✭✭tedobrien98


    I did the ferris wheel ones by doing the circumference. Think it took about 94 minutes to get around. I was delighted with myself and thought it was a nice question that requires a bit of thought; I even put down "Well played, SEC" on it, complimenting those who set the exam... Having second thoughts now seeing what other people did. I was sure that was how to do it.


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    #84
    smiles_1998
    Registered Users Posts: 336 ✭✭smiles_1998


    coolerboy wrote: »
    Hydroelectricity -the sun evaporates the ocean water, and rains it on top of a moutain. then melts it so the water flows downstream, and that water will push the turbine that turnes it into energy.
    Biomass→photosynthesis of plant requires the sun.
    Haha I don't think I got either of them...I just waffled on about the sun's power...:rolleyes:

    On the bright side- I never have to do another Chemistry OR physics exam EVER!!! :D


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    #85
    MissCupcake
    Registered Users Posts: 204 ✭✭MissCupcake


    Scrublord420 wrote: »
    Can someone tell me what biofuel is please? I got stuck on that question about how the sun helps biofuel or something


    its basically plants that are grown and they take the oil from them like rapeseed oil!
    it was the sunlight was needed for the plants to grow


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    #86
    Beca19
    Registered Users Posts: 337 ✭✭Beca19


    luimneachabu wrote: »
    What was the general name for the liquid in the beaker in the distillation experiment?

    Distillate


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    #87
    mjakes20
    Registered Users Posts: 16 ✭mjakes20


    Surely they didn't intend for us to use the circumference formula to find out the distance? I decided to just take the distance as 120m as I thought they would indicate use of circumference by adding 'give your answer to 2 decimal places' or something of that sort. The answer that i got worked out quite nicely so I hope it was just an error on their part. I hope the marking scheme isn't too harsh, as so far I've identified my mistakes as I mixed up which muscles do what in antagonistic pairs, the colour of manganese dioxide, filtrate with distillate and the colours of the indicator with the acid and base for the titration.


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    #88
    Aoife012
    Closed Accounts Posts: 2 ✭Aoife012


    What colour did the egg turn if protein was in it , and for the last question why was a ldr better that a normal bulb?


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    #89
    ECM1234
    Closed Accounts Posts: 225 ✭✭ECM1234


    Aoife012 wrote: »
    What colour did the egg turn if protein was in it , and for the last question why was a ldr better that a normal bulb?

    Light blue-violet in copper sulfate solution :pac:


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    #90
    Liordi
    Registered Users Posts: 2,226 ✭✭✭Liordi


    Aoife012 wrote: »
    ldr better that a normal bulb?

    I said they lasted longer, not sure if that's correct.


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    #91
    Beca19
    Registered Users Posts: 337 ✭✭Beca19


    Liordi wrote: »
    I said they lasted longer, not sure if that's correct.

    Uses less current I think?


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