You are Here: Home

# A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012

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

Announcements Posted on
Find out how cards are replacing warnings on TSR...read more 03-12-2013
1. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
(Original post by poopypie)
Hey does anyone know what can be concluded if a positron is found to have a mass of 1.8 x 10^-29 kg?

the answer is that it is travelling close to the speed of light. Why??
Because positron is anti particle of electron, therefore its "rest" mass should actually be 9.11x10^-31 kg...since mass here is bigger than rest mass, we can deduce that there has been increment in mass due to relativisitc effect (travelling close to speed of light)
2. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Any predictions of what is going to come up tomorrow?
3. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
(Original post by poopypie)
Hey does anyone know what can be concluded if a positron is found to have a mass of 1.8 x 10^-29 kg?

the answer is that it is travelling close to the speed of light. Why??
Positron has mass of electron 9.11 × 10^−31kg.

E = mc^2

To have a change in mass (due to change in energy), particles should be travelling close to the speed of light because c^2 is the constant in the equation.
4. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
is unit 4 tomorrow ??! best of luck to everyone giving it !!!
5. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
(Original post by iesians)
is unit 4 tomorrow ??! best of luck to everyone giving it !!!
Unit 4 is in 3 hours
6. Good luck everyone!

This was posted from The Student Room's iPhone/iPad App
7. Is anyone making a ms for this paper???
Or does anyone have access to It tomorrow so we can all contribute?

Would really appreciate this

This was posted from The Student Room's iPhone/iPad App
8. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
hey guys how waz da exam...my 1 sucked big tym....specially with that Spaceship thing and the vertical velocity derivations...lost more than 24 marks i assume.....um dead.....
9. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
well for that question what i did was first times the mass of the propellent by the speed so we got that momentum. Then I tried to think it out, so it was in space and the type of set up was an explosion, so I said that the momentum of the ship and the propellent must = 0. so taking the momentum of the ship as negative then dividing by the mass, I got the answer 8.02m/s so I said the predicition was pretty accurate, but I am not convinced I am right.
10. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
God. Shouldn't the June exams be easier than the January ones? :/
11. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
I thought it was a very mixed bag. I thought the multiple choice was OK, the first few questions ok, but was a bit thrown off by the 'show this equation is right' questions, and by the vector questions. Hard to tell what I think I got.
12. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Anyone with the June 2011 U5 QP?
13. Anyone actually got the unit 4 paper?
I wanna make a ms

Obviously with everyone's participation lol I'm sure I got nowhere near 100%

This was posted from The Student Room's iPhone/iPad App
14. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Didnt like probing the formula of the tan theta question--had to work myself backwards
For that same question the last part--why was the equation wrong?(2 marks) I didnt have time to put anything as I left for the end but didnt have extra time ahhh!
15. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Hoping the grade boundaries arnt too high!
16. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
I hate Edexcel.
17. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Gotta agree with freddy on the spaceship one, was about momentum, the whole J J Thompson thing was really hard though, I was never taught that, had to derive most of the equations using units aswell, hopefully I'll get SOME marks for it
18. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
I Hate Thomson! :P
19. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
i found that paper hard mainly because I was scared about unit 4 after Jan, so the pressure was still on...this paper started good and then it just went to some next level, they brought in lot of "new" concepts in,whether its for momentum,vector, induction etc...it might have been a bit easier question than Jan but i think in terms of difficulty to do those "new" concept within that time frame, it was difficult as jan..
20. Re: A2 (Edexcel) Physics Unit 4 & 5 6PH08 June 2012
Hopefully Hard Unit 4 = Easier unit 5

## Step 2: Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank

this is what you'll be called on TSR

2. this can't be left blank

never shared and never spammed

3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. By completing the slider below you agree to The Student Room's terms & conditions and site rules

2. Slide the button to the right to create your account

You don't slide that way? No problem.

Last updated: December 26, 2012
Useful resources

## Articles:

Study Help rules and posting guidelinesStudy Help Member of the Month nominations

## Groups associated with this forum:

View associated groups
Study resources