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AQA Physics PHYA5 - Thursday 18th June 2015 [Exam Discussion Thread]

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Original post by chizz1889
Alpha is 0.1m and beta 1m


Damn I wrote that down then decided to multiply them both by ten :lol:

That was a beautiful paper. Was everyone else's optional module as good as Turning Points?
The highest an A* has ever been for astro was 62/75; that paper was June 2011 and was ridiculously easy- it's not going to be higher than 60 for an A*.
Original post by TheRAG
Did we all get Q = mc delta t + ml = 47000J for lead?


I think I got that yeah, to 2 s.f.

Original post by EconFan_73
For the q where people got 5000K can someone explain how you got that? People I spoke to at school all got 16000K


What question was that? :holmes:
Original post by Faaiz Shah
No way . Atleast 62 for an a*.


Doubt it defo an easy paper
**** this. Not checking any comments or mark schemes to get my self depressed over the summer

The paper was ok. Section A was straight forward APART FROM THE ****ING 6 MARKER

Section B was Hard (turning points) but the 6 marker was just bliss!!!
Original post by chizz1889
Alpha is 0.1m and beta 1m


Do you think I'll get the mark for putting alpha is 0.05m and beta 0.1? (I've seen the alpha range to be 5cm on other papers)
Original post by bwr19
I now realise that it should've been that, yeah. Ah well.


Oh dear... Another mark or two lost
Original post by king cobra
The first question


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Uh what did the question ask?

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the image was good quality as the resolving power is less than the viewing angle (or something along those lines cba to think )
Original post by Sbarron
Oh dear... Another mark or two lost


Then you would need to add two AU (one for each side of the sun for the whole diameter of earths orbit)
Original post by Ninja_heel
Doubt it defo an easy paper


Easy 6 markers dont make up for calculations . Some calculations in turning points were kinda tricky.
Original post by RemainSilent
the image was good quality as the resolving power is less than the viewing angle (or something along those lines cba to think )


I wrote that ! :wink:

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How did peopel calculate the density of the nucleas??
Original post by MangoFreak
I think I got that yeah, to 2 s.f.



What question was that? :holmes:


Bout half way through Astro
Original post by QueNNch
Guys what was the range of
- Alpha
- Beta
radiation?

I wrote 0.1 to 1m for alpha and 10-15m for beta had no idea :frown:


The questions previously stated something about maximum range. But
I was a little put off by this; I couldn't find the statement 'ignore relativistic effects' anywhere on the question; so I just guessed with 0.5m and 3m.

(In truth I don't really know, and as it would appear the ranges will vary dependent on speed of the particles)
for tha gold fold if a mixture of istopes of gold is added would the scattering change ? (1 marker)
Original post by EconFan_73
Bout half way through Astro


Oh thank god thought I'd messed up.
Original post by MangoFreak
I think I got that yeah, to 2 s.f.



What question was that? :holmes:

For the lead one it was Q 4 or 5 on Section A (where they asked us to calculate the energy transferred to lead to heat it to it's melting point, then it melts.

For the 16000K one I think it was an Astrophysics question to find the black body temperature of a star
Original post by Faaiz Shah
How did peopel calculate the density of the nucleas??


Density = m/V
Calculate volume from 4/3πr^3
Take r from previous question.

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Original post by Ninja_heel
Doubt it defo an easy paper

Did you do astro?

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