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# AQA Physics Unit 2 (PHY2H) - 30th January 2012 Tweet

Physics exam discussion - share revision tips in preparation for GCSE, A Level and other physics exams and discuss how they went afterwards.

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1. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Swords N Thorns)
Thank you! This helped me out a lot!
No worries
2. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Joe2Jonas)
Lets just hope 2moz there is a 45 mark question on what is Direct Current?
ahahahaha, made me laugh I would give you rep but I have to share it around first

Can someone explain why 6Ci the answer is Alpha and not Gamma?

Hope everyone's late revision is going well, on the bright side the exam isn't until the afternoon so we have break and lunch to revise
3. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
ahahahaha, made me laugh I would give you rep but I have to share it around first

Can someone explain why 6Ci the answer is Alpha and not Gamma?

Hope everyone's late revision is going well, on the bright side the exam isn't until the afternoon so we have break and lunch to revise
You know how on the top numbers (the MASS numbers - protons + neutrons) changes from 238 - 234 and the bottom numbers (the ATOMIC number - protons) changes from 92 - 90, that means there's been a loss of 2 protons and 4 protons+neutrons which has to be ALPHA radition since an alpha particle consists of 2 protons and 2 neutrons.

Gamma is on the electromagnetic spectrum and it is UNCHARGED and has NO MASS. Therefore the changes in mass or proton numbers can only be caused by alpha+beta; not gamma!
4. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
ahahahaha, made me laugh I would give you rep but I have to share it around first

Can someone explain why 6Ci the answer is Alpha and not Gamma?

Hope everyone's late revision is going well, on the bright side the exam isn't until the afternoon so we have break and lunch to revise
An Alpha particle is made up of 2 protons and 2 neutrons.
Therefore, it means 2 will be lost from the proton number (2 protons).
And 4 will be lost from the mass number at the top (as 2 protons have been lost from the top, and 2 neutrons are lost. As the mass number is both the protons AND the neutrons added together, this means that 4 will be lost).
Is that any clearer? Feel free to PM me if you need further help, haha. :P
5. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
I wish more of the physics question had general answers like chemistry ,i really HATE how science works
6. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
ahahahaha, made me laugh I would give you rep but I have to share it around first

Can someone explain why 6Ci the answer is Alpha and not Gamma?

Hope everyone's late revision is going well, on the bright side the exam isn't until the afternoon so we have break and lunch to revise
Alpha because it loses 2 protons and 2 neutrons

It is not Gamma because gamma has no overall charge.

good luck for tommorrow
7. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Nistar)
You know how on the top numbers (the MASS numbers - protons + neutrons) changes from 238 - 234 and the bottom numbers (the ATOMIC number - protons) changes from 92 - 90, that means there's been a loss of 2 protons and 4 protons+neutrons which has to be ALPHA radition since an alpha particle consists of 2 protons and 2 neutrons.

Gamma is on the electromagnetic spectrum and it is UNCHARGED and has NO MASS. Therefore the changes in mass or proton numbers can only be caused by alpha+beta; not gamma!
(Original post by Swords N Thorns)
An Alpha particle is made up of 2 protons and 2 neutrons.
Therefore, it means 2 will be lost from the proton number (2 protons).
And 4 will be lost from the mass number at the top (as 2 protons have been lost from the top, and 2 neutrons are lost. As the mass number is both the protons AND the neutrons added together, this means that 4 will be lost).
Is that any clearer? Feel free to PM me if you need further help, haha. :P
Thank you both! Much clearer than the revision guide
8. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
I hate 2PM exams.
9. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Paparazzo)
I hate 2PM exams.
I have a Biology ISA paper in the morning as well.
10. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Nistar)
I have a Biology ISA paper in the morning as well.
I did the Biology ISA the other day. Do you think it would be the same one? Afternoon exams are always bad for me.
11. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
ive finished every past paper and done all of my notes. ****. watch me forget this over night
12. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Paparazzo)
I did the Biology ISA the other day. Do you think it would be the same one? Afternoon exams are always bad for me.
Did you do an ISA on osmosis with potatoes?
And aw, why?
13. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by woiiiichan)
ive finished every past paper and done all of my notes. ****. watch me forget this over night
Same here....
14. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
guys, do you know what time the exam is, I know the exam is in the afternoon, but at what specific time????
15. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by lionboy434)
guys, do you know what time the exam is, I know the exam is in the afternoon, but at what specific time????
It'll vary for each school but it should be some time between 2pm and 2:45 pm
16. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Nistar)
Did you do an ISA on osmosis with potatoes?
And aw, why?
Yes, that was exactly it. And because I revise then forget it all throughout the day.
17. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
Ok so;
series'- current stays same and voltage splits
Parallel current splits and potential difference stays the same
;'( so confused....
18. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Icantthinkofausern)
Ok so;
series'- current stays same and voltage splits
Parallel current splits and potential difference stays the same
;'( so confused....
I think that's correct!

Good luck everyone!!!!!!!
19. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by PoorLoser)
I think that's correct!

Good luck everyone!!!!!!!
It is, I want to know why?
20. Re: AQA Physics Unit 2 (PHY2H) - 30th January 2012
(Original post by Icantthinkofausern)
It is, I want to know why?
i duno lol, but it says that in my AQA textbook

anyone know whats 7b in this paper??
http://store.aqa.org.uk/qual/gcse/qp...W-QP-JUN08.PDF

thanks
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