June 2011 G485-Fields, Particles and Frontiers of Physics Watch

Right Guard 3.D
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#1121
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#1121
Im not really annoyed at the error, I spotted it and since it was a show that question it didn't have too much effect.

Im really annoyed that pupils were given extra time. Surely its the exam boards decision whether pupils got extra time? My centre didn't get extra time. People may have been disadvantaged here and done it fairly, and others may have been disadvantaged, but then advantaged by extra time.

I honestly think something needs to be investigated here as extra time is just as inexcusable as the error in my opinion.

P.S Extra time wouldn't have affected my performance, its just the principle I'm annoyed at.
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el pollo diablo
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#1122
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#1122
(Original post by Beth1234)
Anyone got the paper and can upload it by any chance? :puppyeyes:
Same request here.
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yokabasha
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#1123
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#1123
(Original post by Oh my Ms. Coffey)
From revision guide

'U235 fuel rods need to be place in a moderator for example water to slow down/absorb neutrons.'

Carbon is definitely right, it's in the official OCR book.
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In the looney bin
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#1124
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#1124
(Original post by Franklin)
Im sure you had to work out the denisty of a nucleon...and they gave you nucleus mass and raidus so you worked out the density of the nucleus and divided that by the nucleon number to give nucleon density...
They gave you nucleus radius and nucleon average mass, then asked for the density of the nucleus.
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el pollo diablo
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#1125
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#1125
(Original post by Pheylan)
Wow this went really badly
Haha same here - and I thought it had gone so well!
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Kalamari Dave
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#1126
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#1126
(Original post by apo1324)
Those are correct. I see what you mean as even though I worked it out, I used their value and got it wrong at first. Then I subbbed in 1.2*10^16 and it gave me the correct answer.
Awesome
Mate, can you upload the paper please?
Pretty pleeeeeeeeeeeeeeeeeeeeeeeeease?
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Raimu
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#1127
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#1127
Reckon I lost about 15 marks overall just from looking at all of these questions you've all posted here. That's not too bad, hopefully I don't lose 15 more from the descriptive questions.

Which direction did you guys P as?
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el pollo diablo
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#1128
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#1128
(Original post by yokabasha)
Carbon is definitely right, it's in the official OCR book.
They only asked for an example - indicating there is more than one possible answer. Water is equally as right.
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el pollo diablo
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#1129
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#1129
(Original post by Raimu)
Reckon I lost about 15 marks overall just from looking at all of these questions you've all posted here. That's not too bad, hopefully I don't lose 15 more from the descriptive questions.

Which direction did you guys P as?
Straight down.
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apo1324
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#1130
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#1130
(Original post by Kalamari Dave)
Awesome
Mate, can you upload the paper please?
Pretty pleeeeeeeeeeeeeeeeeeeeeeeeease?
Scanning as we speak.
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yokabasha
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#1131
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#1131
(Original post by ViralRiver)
I completely had to take a guess (well educated guess). I drew a straight, increasing line up to 0.08m - each 0.04m increasing by by whatever my answer to the Ek question was). Then a similar, but decreasing line for Ek between 0.08m and 0.12m.
I drew an exponential curve cause K.E= 0.5mv^2, v increases with distance, then from 0.08 onwards, it is a straight line, since nothing is changing.
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Captain Hob
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#1132
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#1132
I don't see why they would give the average mass of a nucleon whenever the data book gives you the mass of a proton and the mass of a neutron. If they're giving you anything, it should be the mass of the nucleus.

But this is OCR I guess.
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susan23
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#1133
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#1133
Ok guys, I really don't want a post -mortem on this exam plus I dont see the point since it will only be dperessing and you'll get pissed at the wrong ones since you can't change it. so I'm heading of. I'm sure we all did well (really) good luck with everything else! x
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yu80359
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#1134
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#1134
97 UMS should be how many raw marks on this paper
anyone has any idea?
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d404jamied404
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#1135
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#1135
Just been watching BBC News, and the OCR Physics error was briefly mentioned. As well as the Latin and GCSE Maths
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Oh my Ms. Coffey
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#1136
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#1136
(Original post by Captain Hob)
I don't see why they would give the average mass of a nucleon whenever the data book gives you the mass of a proton and the mass of a neutron. If they're giving you anything, it should be the mass of the nucleus.

But this is OCR I guess.
Saves you having to do x proton number masses + y neutron number masses.
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el pollo diablo
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#1137
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#1137
(Original post by Captain Hob)
I don't see why they would give the average mass of a nucleon whenever the data book gives you the mass of a proton and the mass of a neutron. If they're giving you anything, it should be the mass of the nucleus.

But this is OCR I guess.
OCR - who seem to be messing up every exam they set this year! Ah well. Sounds like loads of people made the same mistake. Hopefully it'll push the grade boundaries down a little.
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Oh my Ms. Coffey
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#1138
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#1138
(Original post by yu80359)
97 UMS should be how many raw marks on this paper
anyone has any idea?
I'd say this paper was slightly harder then the last 2.
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6761
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#1139
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#1139
what do you, guys think about this paper?
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cleverbong
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#1140
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#1140
Does anyone have a copy of the physics exam paper?
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