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# A2 (Edexcel) Physics Unit 4 'Physics on the Move' - 24th January 2012

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1. (Original post by HassanZia)
guyz the problem with june 2011 paper is that theyve started asking so much irrelevant stuff.. I wish i was born 2 years earlier lol..
Yeaa! It was easier back then! :/ Aghh. Lets hope that the exam is and "easy" one :P
2. Can someone explain why Q5 on the Jan 2010 is C. Im doing F=BILsin(theta) x N
3. (Original post by tomvars)
Can someone explain why Q5 on the Jan 2010 is C. Im doing F=BILsin(theta) x N
The side QS is always perpendicular to the magnetic field lines
4. (Original post by ahmedm0209)
The side QS is always perpendicular to the magnetic field lines
oooohhhhh thank you
5. (Original post by gcse_____)
Ppl is June 2011 extremely different and difficult than other papers or is it just me .......
idk
bio 1 2
phy 1 2
chem 2
all of em were easy
6. What's an alternative way to convert Mev/c2 into kg? Is there a way to do this using E=mc2?

Here's how I do it:
7. (Original post by Alpha-Omega)
What's an alternative way to convert Mev/c2 into kg? Is there a way to do this using E=mc2?

Here's how I do it:
You are using E=mc^2 there (-aren't you?). 'Masses' quoted in those units are simply referring to the energy created when the mass you are talking about disappears. So you convert to joules and divide by the speed of light squared to get the mass value.
8. I'm cacking myself for this test.
Gotta keep remembering that 75% will almost certainly be an A.
9. (Original post by MHRed)
I'm cacking myself for this test.
Gotta keep remembering that 75% will almost certainly be an A.
In January 2011 test paper, 71.25% is already an A*.
10. We never actually went over cyclotrons in class, so I've had to teach myself the entire theory behind it. I guess any questions to do with Rutherford firing alpha particles just requires a stock answer that can cover all points regardless of how the question is structured.

I just hope it's a nice paper; I resat Papers 1 & 2 and they were way too wordy. I deserve a break...
11. All June 2011 papers

http://www.xtremepapers.com/communit...-all-gce.9965/
12. 2mw !!! Aghhh! :/ Panicking
13. tomorrow bumping this thread for discussion
14. i think faradays and lenzs law is going to come up in this paper, because it didnt come up in june 11
15. Particle physics question:

Proton + anti-proton---> 2Pion+ + 2Pion- + Pion0

anti-proton collides with proton which is at rest. Anti-proton has an energy of 1 GeV, proton mass is 940MeV/c^2, mass of neutral pion is 135 MeV/c^2 and mass of a charged pion is 140MeV/c^2

How much energy was available for kinetic energy of the pions?
16. (Original post by tomvars)
Particle physics question:

Proton + anti-proton---> 2Pion+ + 2Pion- + Pion0

anti-proton collides with proton which is at rest. Anti-proton has an energy of 1 GeV, proton mass is 940MeV/c^2, mass of neutral pion is 135 MeV/c^2 and mass of a charged pion is 140MeV/c^2

How much energy was available for kinetic energy of the pions?
Anti-proton has the same mass as a proton.
Convert masses of protons and anti-protons to energy values.
Sum these energy values with the KE value of the anti-proton (given).

The energy necessary to form the particles on the right has already been given.

Subtract to find the energy left, which is the energy available for the KE of the pions.

It's just conserving energy, but you have to take into account that mass and energy can interchange on a sub-atomic level.
17. In case anyone cares, I'm currently watching this video for revision:

18. (Original post by fluteflute)
In case anyone cares, I'm currently watching this video for revision:

OMG. Thankss (: x
19. it seems like january's paper is more difficult
20. Anyone have any revision notes? this edexcel book sucks =P

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