jarasta
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#1901
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#1901
(Original post by Math-Magician)
Instead of doing it algebraically, I worked out the ratio of (delta t cola)/(delta t glass) by doing [(McCcTc)/(MgCgTg)=Tc/Tc] and got 1/4. This then means (delta t cola) = 1/5*(30-3), and my final answer was 8.4C, about 8C. Will I still get the marks as I knew what I was doing but this method isn't as easy to follow?
No no, I think they will be able to follow. It's essential the same as the algebra method, except I guess you re-arranged the formula first. The seem to like ratios so it will prob be in there, as long as its a logical and valid method its fine and its clear what you did.
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jarasta
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#1902
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#1902
(Original post by cat-lover)
Darn. How many marks would I lose? And thanks.
just 1 out of 2 I guess.
If you used your 7.whatever came after, probably 1 again on the next part for error carried forward. Unless if there is a range of answers and your answer is in the required range. Just what I think. Don't stress about it too much though.
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Minumi
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#1903
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#1903
Any unofficial mark schemes for part A and turning points yet?
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Math-Magician
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#1904
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#1904
(Original post by jarasta)
No no, I think they will be able to follow. It's essential the same as the algebra method, except I guess you re-arranged the formula first. The seem to like ratios so it will prob be in there, as long as its a logical and valid method its fine and its clear what you did.
Thanks - I hope they can read the last two lines of working since I almost ran out of room!
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jarasta
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#1905
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#1905
(Original post by Math-Magician)
Thanks - I hope they can read the last two lines of working since I almost ran out of room!
It should be fine, they will try to read it unless its actually very hard to read.
I run out of room as well, because I couldn't figure out how to do it at first. I tried to cheat by substituting 8 into there, but I imagined that wouldn't count as proof only verification.

What grade are you hoping for overall?
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Math-Magician
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#1906
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#1906
(Original post by jarasta)
It should be fine, they will try to read it unless its actually very hard to read.
I run out of room as well, because I couldn't figure out how to do it at first. I tried to cheat by substituting 8 into there, but I imagined that wouldn't count as proof only verification.

What grade are you hoping for overall?
Its not unreadable, just a bit small! I want an A overall, but for that I need to get around 80/120 UMS on this module depending on ISA boundaries. What do you need to get?
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jarasta
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#1907
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#1907
(Original post by Math-Magician)
Its not unreadable, just a bit small! I want an A overall, but for that I need to get around 80/120 UMS on this module depending on ISA boundaries. What do you need to get?
I think you can get that, if you were capable of doing q3 you should be fine, personally i thought that was the hardest question. I skipped it once, then came back to do part i), the came back again for part ii).
Ahh thats, I need to get about 42 for an A depending on the ISA boundary, assuming i get atleast 48 ums for my 44 isa mark.I would like to get the A* (for the pride ) for which I need more or less 108 ums.
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Math-Magician
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#1908
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#1908
(Original post by jarasta)
I think you can get that, if you were capable of doing q3 you should be fine, personally i thought that was the hardest question. I skipped it once, then came back to do part i), the came back again for part ii).
Ahh thats, I need to get about 42 for an A depending on the ISA boundary, assuming i get atleast 48 ums for my 44 isa mark.I would like to get the A* (for the pride ) for which I need more or less 108 ums.
It must have been a pretty hard question, I can hardly remember any of the others! Fingers crossed we all got what we need, I never know how I've done in Physics until results day, its not like maths where you know how you've done. :iiam:
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jarasta
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#1909
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#1909
(Original post by Math-Magician)
It must have been a pretty hard question, I can hardly remember any of the others! Fingers crossed we all got what we need, I never know how I've done in Physics until results day, its not like maths where you know how you've done. :iiam:
I know you get some questions which you can't really get correct unless if you had read the markscheme

yeah same, I feel like my exams went well overall but im still freaking scared, this will be the worst summer ever in terms of exam stress I imagine :/
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Math-Magician
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#1910
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#1910
(Original post by jarasta)
I know you get some questions which you can't really get correct unless if you had read the markscheme

yeah same, I feel like my exams went well overall but im still freaking scared, this will be the worst summer ever in terms of exam stress I imagine :/
What do you need in all your other subjects? I have a really high offer to meet so its going to be very easy to just miss out by one grade on something
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jarasta
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#1911
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#1911
(Original post by Math-Magician)
What do you need in all your other subjects? I have a really high offer to meet so its going to be very easy to just miss out by one grade on something
A*A*A for me in maths, further maths and physics. The A* are pretty easy to miss, it can be down to something like not losing 5 marks! which is insane especially in maths because mistakes can be made easily even if you know everything and did everything . What's your course?
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Math-Magician
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#1912
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#1912
(Original post by jarasta)
A*A*A for me in maths, further maths and physics. The A* are pretty easy to miss, it can be down to something like not losing 5 marks! which is insane especially in maths because mistakes can be made easily even if you know everything and did everything . What's your course?
Maths at Warwick (if I get in). I need the same grades as you for that What are you hoping to do?
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lantern
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#1913
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#1913
Hello,
for the binding energy question, I only included He and H when calculating the mass difference. Is this wrong? :confused:
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Math-Magician
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#1914
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#1914
(Original post by lantern)
Hello,
for the binding energy question, I only included He and H when calculating the mass difference. Is this wrong? :confused:
I think there were some positrons or electrons as well? I'm not too sure, I can't really remember the question. If there were some electrons I think you have to include them.
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ehtisham_1
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#1915
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#1915
Hey guys what did the question did question 2 include in turning poins,, I know it was about neutrons and debroglie wavelength but what other questions did it have.

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jamzzster
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#1916
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#1916
I'm so glad this exam is done and out of the way, now to stop thinking about it. Oh wait I keep visiting this thread..
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Dslash
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#1917
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#1917
(Original post by ehtisham_1)
Hey guys what did the question did question 2 include in turning poins,, I know it was about neutrons and debroglie wavelength but what other questions did it have.

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It asked you to explain why an electron with the same db-wavelength has a greater kinetic energy (or something along those lines).
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ehtisham_1
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#1918
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#1918
(Original post by Dslash)
It asked you to explain why an electron with the same db-wavelength has a greater kinetic energy (or something along those lines).
Do you know how much the whole of question 2 was out of, cause when I add it all up its 31 marks and I'm missing 4 marks somewhere. I know q1 was out of 12 q3 was out of 8 and q4 was out of 7

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ehtisham_1
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#1919
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#1919
Was there a question on the back of the paper for turning points.

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Dslash
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#1920
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#1920
(Original post by ehtisham_1)
Do you know how much the whole of question 2 was out of, cause when I add it all up its 31 marks and I'm missing 4 marks somewhere. I know q1 was out of 12 q3 was out of 8 and q4 was out of 7

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No there wasn't a question on the back.
Q2:
State de broglies hypothesis: 2 marks
Calc. the db-wavelength of the particle: 4 marks
Electron with the same db-wavelength: 2 marks
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