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

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I see. I need to revise it too. I'd struggle to answer a six marker on that even though it's probably one of the "easier" topics. I can give an order but not reasons (EG: hydrogen runs out and star swells etc)

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totally agree that stars will came up on the astro paper, any predictions for section A i think it will be thermal for the 6 marker as its only come up on the june 2011 paper...

Reply 921

CD223

Original post by Hellomoto.

totally agree that stars will came up on the astro paper, any predictions for section A i think it will be thermal for the 6 marker as its only come up on the june 2011 paper...

Personally, I can see a SHC experiment.

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Reply 922

Lau14

Original post by CD223

Maybe it would be good practice if any of us who want to write out an answer to a theoretical six marker, like you suggested (e.g. X has a larger mass (>3 solar masses) and Y has a lower mass (~1.4 solar masses), describe the life cycle of these stars), and then compare points between us to see what would likely be necessary to get the marks?

Reply 923

CD223

Original post by Lau14

I'd be up for that? I'll try and write an answer. It won't be great, mind, haha.

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Reply 924

Lau14

Original post by CD223

I'd be up for that? I'll try and write an answer. It won't be great, mind, haha.

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I haven't done any revision lately for physics (don't even have any notes with me tonight oops) so I don't expect mine will be great either! But anything is a good starting point and if it actually does come up in the exam we'll be prepared

Reply 925

CD223

Original post by Lau14

I'll get 'star'ted (pun was necessary) tonight.

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Reply 926

Lau14

Original post by CD223

I'll get 'star'ted (pun was necessary) tonight.

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Puns are always necessary :biggrin:

I'll probably do mine shortly

Reply 927

Lau14

X has a larger mass (>3 solar masses) and Y has a lower mass (~1.4 solar masses), describe the life cycle of these stars.

Spoiler

Reply 928

Amanzz

Anyone have any tips for tackling the special relativity question calculations. They're not always 100% clear and it can be quite frustrating

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Reply 929

Fireiscatching1

Original post by CD223

Anyone doing astro?

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im doing astro although feeling a tad lost with it all. its just not sinking in and a lack of notes isn't helping

Reply 930

CD223

Original post by Lau14

X has a larger mass (>3 solar masses) and Y has a lower mass (~1.4 solar masses), describe the life cycle of these stars.

Spoiler

This is great! I'll make sure I look over and try and add to this tonight :tongue:

Thank you

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Reply 931

CD223

Original post by Fireiscatching1

im doing astro although feeling a tad lost with it all. its just not sinking in and a lack of notes isn't helping

Have you seen the AQA Nelson Thornes course notes? They're pretty useful.

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Reply 932

huniibehi

Burdittphysics on YouTube gives nice examples for the multiple choice section :smile:

Reply 933

Absent Agent

Original post by Amanzz

Anyone have any tips for tackling the special relativity question calculations. They're not always 100% clear and it can be quite frustrating

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I still haven't done questions on that topic. In fact i haven't finished that topic yet :frown:

What's absurd about the questions?

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Reply 934

Lau14

Original post by CD223

This is great! I'll make sure I look over and try and add to this tonight :tongue:

Thank you

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Needs some work doing on it (eg actually comparing it with my notes etc!) but not too bad considering we've got a while until the exam!

Reply 935

CD223

Original post by Lau14

Needs some work doing on it (eg actually comparing it with my notes etc!) but not too bad considering we've got a while until the exam!

I'm trying not to rely too heavily on the week between exams :L

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Reply 936

JaySP

In a question such as this, I would be tempted to give the answer:

"Rain, pollution, cloud coverage"

Could the mark be penalised?

Reply 937

CD223

Original post by JaySP

In a question such as this, I would be tempted to give the answer:

"Rain, pollution, cloud coverage"

Could the mark be penalised?

It's hard to say. What is the actual answer?

You are correct, it just depends on how specific they want you to be.

Personally, I would say "water (vapour)".

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Reply 938

JaySP

Original post by CD223

It's hard to say. What is the actual answer?

You are correct, it just depends on how specific they want you to be.

Personally, I would say "water (vapour)".

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Water vapour is the correct answer buts lets say i did put that instead of rain. Would i have still got the mark amidst the other answers?

Reply 939

CD223

Original post by JaySP

Water vapour is the correct answer buts lets say i did put that instead of rain. Would i have still got the mark amidst the other answers?

Does that mark scheme allow for other answers? It depends on what the MS actually says. "Any sensible answer" is sometimes included.

That said, because it said "in the atmosphere", it makes me think of a particular element/compound in the atmosphere, over physical entities such as clouds.

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