Hey guys! Didn't see a thread for this exam so I thought I'd create one for people to share revision tips and any other preparation for this exam really.
I created a Mediafire folder with all the current past papers and mark schemes for PHYA4 including Jan 12. There aren't that many as it's a new syllabus, so you can get the legacy ones off of the AQA site if you like. Here's the link:
So we've all done it, and we're probably all sitting in our bedrooms crying about how university is now out of the window... I joke, it was a very hard paper but don't worry people I'm sure the boundaries will reflect it.
My best guess for grade boundaries would be:
A* - 50
A - 44
B - 38
etc... But once again that's just a guess based on how much harder I thought the paper was than past papers. Remember that TSRians represent a bunch that does better than the average candidate (bunch of try hards we are) so what one of us thinks is an easy/hard paper might be hard/a damn load harder for everyone else. The AS stuff is bound to throw marks down the drain for some people (for the 3 marker on electron excitement anyway) and the 3 mark part of the momentum question was a tricky one.
Anyone else not do maths and find this exam terrible? I was happy with it before the exam in Jan, but when it came to it I just froze and came out with a D. Need to get an A this time round and past papers so far going well! Anyone know how similar the legacy papers are or is it a completely different spec/set up?
Need help with a question, but can't seem to find it It was something along of the lines of, what is the gravitational field strength of a planet with both, a density and radius twice that of Earth? The answer was 4F I think. Anyone?
EDIT: Need to clear something else up too. Are these phase relationships in SHM correct?
Velocity and displacement = pi/2
Velocity and acceleration = pi/2
Acceleration and displacement = pi
SHM: 'The frequency and Time period don't depend on the amplitude' could someone try and explain why ? because the equation a= -(2 x pi x f )^2 x A (A being max displacement) Links them both together. Cheers in advance!