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

Hodgy93
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#1181
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#1181
(Original post by fwed1)
I think I got all the same answers as you! haha
I think I also got these answers, I got 1/3 and not 3/1 ... sure we're right =)
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TobeTheHero
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#1182
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#1182
did people get 397 W for power disssipated?
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Oh my Ms. Coffey
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#1183
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#1183
Also what did people get for a reason why its hard to predict the future of the universe. I put because it depends on the value of p0 which relies on H0 being accurate, thats wrong though.
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yu80359
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#1184
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#1184
got 74 marks at least YES
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TobeTheHero
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#1185
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#1185
(Original post by Hodgy93)
I think I also got these answers, I got 1/3 and not 3/1 ... sure we're right =)
i got 1/3 as well this is so weird and I used v=3V
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Pheylan
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#1186
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#1186
(Original post by TobeTheHero)
question says 'e.m.f across the output is 12V"

they give you Nprimary=4200 and Vs=12V


so Ns= 4200x 230/12= 805200
I doubt the validity of this statement

(Original post by TobeTheHero)
I've aced it all
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purist66
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#1187
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#1187
(Original post by Oh my Ms. Coffey)
Also what did people get for a reason why its hard to predict the future of the universe. I put because it depends on the value of p0 which relies on H0 being accurate, thats wrong though.
I put that it was to with Ho cannot be calculated accurately which in turn means Po can't be either.

That's what my teacher told me. But dunno if he is right then lol
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Oh my Ms. Coffey
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#1188
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#1188
(Original post by Pheylan)
I doubt the validity of this statement
Jesus christ cannot rep, FUUUUUUUUUU.
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purist66
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#1189
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#1189
(Original post by TobeTheHero)
i got 1/3 as well this is so weird and I used v=3V
was this the ratio of energy stored by capacitors?

if so then I got 1/3
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In the looney bin
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#1190
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#1190
(Original post by Oh my Ms. Coffey)
Also what did people get for a reason why its hard to predict the future of the universe. I put because it depends on the value of p0 which relies on H0 being accurate, thats wrong though.
I thought that was just a throw-away mark for the U-grade candidates. I put density of universe too hard to calculate, and believe it is as simple as that - or any other simple reason.
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TobeTheHero
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#1191
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#1191
was the total capacitance 1/C=1/c1+1/c1??
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Pheylan
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#1192
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#1192
(Original post by Oh my Ms. Coffey)
Also what did people get for a reason why its hard to predict the future of the universe. I put because it depends on the value of p0 which relies on H0 being accurate, thats wrong though.
"It's difficult to get an accurate value for the density of the universe because there is so much matter to consider" :mmm:
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TobeTheHero
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#1193
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#1193
(Original post by Pheylan)
I doubt the validity of this statement
I didn't say i aced the calculations just the long descriptive ones
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Raimu
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#1194
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#1194
I said because of dark matter, isn't that right?
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Pheylan
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#1195
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#1195
(Original post by Oh my Ms. Coffey)
Jesus christ cannot rep, FUUUUUUUUUU.
It's the thought that counts
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TobeTheHero
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#1196
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#1196
(Original post by Pheylan)
"It's difficult to get an accurate value for the density of the universe because there is so much matter to consider" :mmm:
i just said the current model of the universe is uncertain
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purist66
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#1197
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#1197
you know the error in the question about the electric fields where it was 0.05cm in stead of 0.05m....do you think that we will get marks added for that error because I converted the cm to m because that's what I thought it wanted.
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In the looney bin
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#1198
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#1198
LOOOL, dated 10th June

http://www.ocr.org.uk/news/2011/item_020.html

Failed already OCR mate
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purist66
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#1199
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#1199
(Original post by In the looney bin)
LOOOL, dated 10th June


http://www.ocr.org.uk/news/2011/item_020.html


Failed already OCR mate
:L They really have screwed up this year
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Darkfirez5
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#1200
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#1200
(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...
Quick point, just to say that the density for both will be the same, as density is weight per volume, so therefore the value for density is interdependent of volume, 1 kg of steel is the same density as 10 kg of steel

Just read the paper, it does ask for the average density of the nucleus, but as I said, it shouldn't be different
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