Edexcel FAS(triple) Physics P3 exam 19th June 2015

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I have to say even though I understood the last 6er, it was more biology related than physics, and seems a bit desperate from Pearson, almost as if they ran out of ideas!

Couldn't agree more. There were many more they could've examined us on really…

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Reply 41

EarlOfMaidstone

Original post by xx_lofsuburbia

No, the one where they gave you a scale

It was around 11cm wasn't it?

Reply 42

xx_lofsuburbia

Original post by EarlOfMaidstone

It was around 11cm wasn't it?

That was what I put

Reply 43

yukicookie

Original post by EarlOfMaidstone

2.1 x 10^-3 which was box C I think?

I selected box C as well.

Reply 44

EarlOfMaidstone

Original post by TheLadyInBlack

Couldn't agree more. There were many more they could've examined us on really…

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The grade boundaries have to be quite low, it was a technical paper which wasn't just physics based, I would say 44-45/60 for an A*

Reply 45

yukicookie

Original post by EarlOfMaidstone

It was around 11cm wasn't it?

Yup. I got 11 : )

Reply 46

FatimaHere

Loveeed this exam!!! Went so so so so much better than Chemistry! Dropped 3 or 4 marks max I think?
And the 6 mark questions were pure gifts!!!! *thanks edexcel paper authors* :biggrin:

Reply 47

EarlOfMaidstone

Original post by yukicookie

Yup. I got 11 : )

Good good! I know I've messed up some 1 markers but am overall quite pleased

Reply 48

xx_lofsuburbia

Original post by EarlOfMaidstone

Good good! I know I've messed up some 1 markers but am overall quite pleased

It certainly went better than P2

Reply 49

Akashi

Made a LOT of stupid mistakes - especially with the arithmetical questions. Forgot to convert Celsius to kelvin, made calculator error with the image distance and that's been occurring for all my science exams ffs.

What was the gist for both 6 markers?

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(edited 8 years ago)

Reply 50

EarlOfMaidstone

What did people say for the background radiation from the graph? I guessed 0.5 but I'm probably wrong

Reply 51

KD1024

Original post by EarlOfMaidstone

What did people say for the background radiation from the graph? I guessed 0.5 but I'm probably wrong

Said 0.6 but no idea if it's right. I just presumed the highest thickness blocks all light and what's left is background

Reply 52

devkulasooriya

Original post by hahahahaha123

It was the 10^-2 i think

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I got the same answer.

Reply 53

Skating21

I liked the exam apart from a few mathematical questions. Hope the boundaries are low.

Reply 54

FatimaHere

Original post by yukicookie

I selected box C as well.

Same

Original post by Akashi

I can't exactly remember what I've written because I've done things since the exam, but I think they were something like this:
1. First about hospital and scientific use of particle accelerators and how they differ:
Differ in size, price, power used
Hospital- for radioisotopes from cyclotrons, brief description of cyclotrons
Why radioisotopes are useful, short half life PET scanning from cyclotron too etc. Iodine radioisotopes for thyroid health review.
Scientific- SERN, Large Hadron Collider- Accelerating charged particles towards on another to observe reaction- this is how higgs boson was found but this still needs validation
Fewer science Particle accelerators due to price. Talk about observation of any other patricles being emitted from collision or other radiation
I think that's at least most of what I'd written for that first one.

2.ECG Trace
Label P wave,QRS complex, T wave
Sino atrial node emits action potentials/electrical impulses like natural pacemaker
Causes atrial systole (contraction) of atria, this is P wave
Action potentials move to atrio-ventricular node (about the centre of heart), cannot pass through bottom of atria due to insulating cardiac tissue
pauses before emitting signal, so blood can move to ventricles.- this is dip between P wave end and Q wave start
A.V node emits signal, causes ventricular systole (contraction) and blood pushed out of heart- this is QRS complex wave
Larger because greater electrical signal
Heart recovers- recovery time or time for depolarisation is T wave
All impulses traced and shown on ECG trace
Refer to numbers written- can't rememeber what they were but one was time from T wave end to P wave start
Usual heart beat
Hm, I think that's all I put, might be more but I can't remember. :P

Hope I helped! There was hardly any space for the 6 markers! Had to use more paper both times. D: