OCR Physics A G485 - Frontiers of Physics - 18th June 2015 Watch

Flux_Dubstep
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#1581
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#1581
Not sure how it went really. Easier than expected but then again I was expecting the worst

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Devran22
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#1582
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#1582
(Original post by seizetoday)
1.4*10^10ly
Years not light years

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Tiwa
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#1583
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#1583
Such a great paper!
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pje1000
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(Original post by BrokenS0ulz)
13.4 activity
64% transmitted ultrasound
1.8x10^-3 average current
520 Ks^-1 for the heating thing
16 for ratio of ke
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Did you multiply by 0.99 for the energy on that one? As only 99% was converted to heat?
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Ki Yung Na
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#1585
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(Original post by jcwh97)
LOL exams aren't meant to be fun
I actually found a few of the topics in G845 quite enjoyable!
What did you think of the paper?

Ah I get bad grades but when the stuff's interesting my attention is so much better hence the disappointment
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Help_Me_Alex
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#1586
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For the ratio of the power one did anyone get a big number as in 10^(+), friends are saying they got 10^(-)
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seizetoday
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#1587
(Original post by Devran22)
Years not light years

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Yeah that's what I meant.
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Leechayy
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#1588
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(Original post by pje1000)
Did you multiply by 0.99 for the energy on that one? As only 99% was converted to heat?
Multiply by 0.01 as only 1% is actually applied to the photon

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BrokenS0ulz
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#1589
(Original post by pje1000)
Did you multiply by 0.99 for the energy on that one? As only 99% was converted to heat?
Yeah to get energy = 712.8 I yhink
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Ki Yung Na
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#1590
What are people predicting the grade boundaries will be?
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jcwh97
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(Original post by Help_Me_Alex)
For the ratio of the power one did anyone get a big number as in 10^(+), friends are saying they got 10^(-)
I got an answer of 10^7 which im confident with
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seizetoday
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What did you guys get for the light years question?
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xy0mz
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(Original post by Genty Boy)
I didn't really know what to do for the sketch. For the first one I did an exponential with asymptotes of x=0 but then for the second one about heat I just made it not go down so fast exponentially in comparison to the other.

What did you guys do?


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I did the heat one below because its potential divider circuit so V decreases


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BrokenS0ulz
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(Original post by Leechayy)
Multiply by 0.01 as only 1% is actually applied to the photon

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It was asking for the heat energy transferred ?
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jcwh97
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(Original post by Leechayy)
Multiply by 0.01 as only 1% is actually applied to the photon

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That was for the second part
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Leechayy
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That all nighter paid off so much, physics went well.

The capacitor question + the CAT scan question threw me off a little though

But since the paper overall wasn't that bad, it'll probably be mid 70s for an A.
Which means mistakes will be the death of me

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L'Evil Fish
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#1597
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(Original post by Help_Me_Alex)
For the ratio of the power one did anyone get a big number as in 10^(+), friends are saying they got 10^(-)
10^7 ish
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Help_Me_Alex
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(Original post by jcwh97)
I got an answer of 10^7 which im confident with
did you get that with P = (T^4) x (r^2) ?
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jcwh97
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(Original post by Ki Yung Na)
I actually found a few of the topics in G845 quite enjoyable!
What did you think of the paper?

Ah I get bad grades but when the stuff's interesting my attention is so much better hence the disappointment
Yeah fair enough I have found g485 the most interesting out of everything I do. For me the exam was good but waiting for that uno. mark scheme
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Genty Boy
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#1600
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(Original post by BrokenS0ulz)
13.4 activity
64% transmitted ultrasound
1.8x10^-3 average current
520 Ks^-1 for the heating thing
16 for ratio of ke
?
Agreed, but I made it 36%. I may have RTQ wrong...


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