OCR Physics A G484 - The Newtonian World - 11th June 2015 Watch

The Room Student
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#1581
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#1581
I spent so long getting Brownian motion nailed, word for word, last night.

Typical...
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Lousamnap
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#1582
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#1582
contemplating blaming OCR in my suicide letter!!
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[email protected]
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#1583
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#1583
(Original post by BrokenS0ulz)
you know when we had to derive keplers third law, was that basically v=2pir/T, F=mv^2/r stuff, equating them and then subbing into F =GMm/r^2?
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Jackasnacks
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#1584
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#1584
(Original post by ETRC)
that's not as bad as what i did

i messed up 6 easy marks on shm questions- my brain just decided to quit
and i completely forgot about direction in momentum

i don't even know why the questions were worded so crap
SHM part was a solid nope.
OCR must think they're bloody hilarious these two years absolute joke
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whyalwaysme??
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#1585
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#1585
38/60 for an A? last year g482 was 59/100 for an A
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L'Evil Fish
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#1586
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#1586
It wasn't really a hard paper I don't think...

Even thought I did ****, and will actually help lower the boundaries, it was just the psychological effects of not being able to do first q immediately.

Or second...

Or third...

****

Lmao jk
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MMB07
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#1587
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#1587
I disagree with Kepler's 3rd law.

I conclude that r^3 is inversely proportional to T^2

Where r is the distance away from getting into uni and T is the total marks on that exam
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SH0405
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#1588
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#1588
(Original post by chukster97)
where was the 41? i dont remember seeing that
It had to be worked out from the given volume and temperature of the additional tank.
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aleishahogan
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#1589
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#1589
Well those first two questions were a joke. Rest of paper was ok but definitely made stupid mistakes. Any unofficial markschemes around?
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Chung224
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#1590
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#1590
what does everyone think an A grade will be?
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verello12
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#1591
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#1591
For the last question where it asks you to find the Pressure. What did you guys do.

This is what I did,

Since T was the same in the tank and the other thing (forgot what it was called) it meant that P1 xV1 = P2 x V2 cause of Boyales law.

You knew then volume of both tanks and you knew the preassure of the first tank so I just subbed in and that's how I got P2, not sure if I did it right, I feel like I missed something.
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fatart123
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#1592
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#1592
(Original post by Chung224)
what does everyone think an A grade will be?
40 exactly? I hope it's lower than last year, but I don't think they can even go that low
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SomeGuy96
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#1593
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#1593
(Original post by ImLiterally12)
Yup, I got 81 moles total i think. Not sure about the volume but I added both of them together.
I also got 81 moles total, giving 36.something moles for helium and not 41. I wonder what we did wrong. Any other 36ers?
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maattwileman
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#1594
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#1594
(Original post by ETRC)
lost 3 marks on first page- question made no sense
probably lost 1 mark for a- i got a negative sign but correct answer
lost 3 marks for explanation afterwards

lost 6 marks in shm- my graph was not negative gradient, messed up a/x and amplitude was not decreasing

lost 3 marks somewhere for sure for some of the explain questions

didn't add up volumes (i still think my answer is correct and you don't add volumes) 1 mark

so at best i think i can get 45-46 with follow through marks

did worse in this than f324 lol
had to state newtons law of gravitation as a word equation hence you need to define G. another mark lost..
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Chung224
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#1595
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#1595
(Original post by fatart123)
40 exactly? I hope it's lower than last year, but I don't think they can even go that low
i doubt they'll be lower but i don't think they'll be much higher. will be higher but like 2-3 marks i think
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aleishahogan
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#1596
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#1596
Also where was like circular motion and Brownian motion o.o
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HMusa
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#1597
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#1597
(Original post by L'Evil Fish)
It wasn't really a hard paper I don't think...

Even thought I did ****, and will actually help lower the boundaries, it was just the psychological effects of not being able to do first q immediately.

Or second...

Or third...

****

Lmao jk
Completely agree with you. If that first question was instead placed last it wouldn't have been such a difficult paper. I completely ****ed most of it up though 😭😭😭
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maattwileman
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#1598
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(Original post by verello12)
For the last question where it asks you to find the Pressure. What did you guys do.

This is what I did,

Since T was the same in the tank and the other thing (forgot what it was called) it meant that P1 xV1 = P2 x V2 cause of Boyales law.

You knew then volume of both tanks and you knew the preassure of the first tank so I just subbed in and that's how I got P2, not sure if I did it right, I feel like I missed something.
thats wrong as cant use Boyles law as not constant mass. Helium was added...
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ETRC
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#1599
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#1599
(Original post by maattwileman)
had to state newtons law of gravitation as a word equation hence you need to define G. another mark lost..
what the actual **** you had to define G?. I just wrote product of masses times G and said what G is. If you had to define G then the question is BS for 1 mark only.
This paper is the definition of ****.
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brettcollett
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#1600
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#1600
Anyone got the modal answers?
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