Hmm, found section A allright, but section B was horrible. First question, about stationary waves was by far the easiest. Capacitance experiment, i missed out!! Just the wrtiing bit though, not the calcs.
I just hope I've picked up at least 12 marks on section A and 20 marks on section B. The grade boudaries should go down - previous years have been around 70% for an A. I'm just hoping for a B though.
I just hope aqa chem will be easy tommorrow. Need an A in that!!
It was pretty challenging, yeah. Made a few stupid mistakes, like I forgot that the one about jupiter was given in km not m, and I when converting from MeV to joules i forgot the M, and I couldn't remember how big a fm was. Other than that it was ok really, no problems with the multiple choice I don't think. Hopefully an A considering the previous low boundaries.
Oh I got some different ones to you... Crap! Don't worry, those were the ones I was absolutely clueless about so I'm definitely wrong. And one I actually got the right answer but apparently circled the wrong letter!!
Paper was f*ing hard. I was contemplating breaking my pencil in when the examiner called "5 more minutes". Left loads of blanks in section B My teacher's right, I'm gonna get an E...
My answers to your answers seem quite similar except Q15 i put Boron.
Was not a great exam. I thought it was way harder (section b) than any of the past papers i've done before. I was writing right up to the end which was unusual i my experience. I didn't like the capacitance question at all. Hopefully low mark boundaries.
Section B was the equivalent of taking a sledgehammer and mashing it into my cranium. Honestly, that was an absolute bastard of a paper, and by your answers from section A, i've mucked that up too. For 1 I put C, for 2 I put D, for 9 I put A, 10 I put B, and 15 I put C. So that's... 10/15. Considering i was hitting 13/15 in all the past papers (and trust me, i did them ALL), i'm gutted.
The physics paper wasn't too bad. Section A was quite easy, section B was tough but do-able. The electric field question
When it is perpendicular:
Force acts towards the positive plate; vertical acceleration ; therefore change in vertical velocity; horizontal velocity is constant; electron takes a 'parabolic' trajectory.
The Jupiter Question:
part i) F= -GMm/r^2
mw^2r= -GMm/r^2 (w=2pi/T)
Rearrange and simplify to get:
T^2 = (4Pi^2.r^3)/GM
for the last part (mass of jupitar)...u only had to plug the numbers in and get an answer of approx. 1.3x10^27 kg
Capacitance question part A
Large resistance; longer discharging time; low percentage error
Resistance of around 2000 K Ohms (as time constant will be approx. 60 seconds)
(Original post by mikeleeds)
That was a bit nasty of them - to use standard form but also KM... I noticed it but only second time round. Guess fm was -15 as I knew -13 was pico, and came out right...
Yes, I was trying to work it out but forgot about pico. I was planning to go back to it and work it backwards at the end but I didn't have a whole lot of time which is unusual. Pico is -12 by the way, but you got it right anyway!