2016 | OCR A2 Advancing Physics B | G494 & G495 | 20th & 28th June

That was certainly interesting... Lots of wordy questions. I couldn't do the exponential disproof at all because the data that I used actually did follow an exponential relationship.. I'm fairly certain I also mucked up the double mass half pressure question where I chose the line with gradient 1. Fairly certain that gradient 1/4 was correct. Oh well, I just hope that G495 is a bit better because I really need an A.

(edited 7 years ago)

Reply 41

VlAd x

4

Original post by Polyrogue

Was struck with a splitting headache just before the exam :'( had to battle through it the entire time. I think I did quite well, but given the constant throbbing pain I feel right now I can't be sure.

What did u do for the one with wide range of values of helium energy and the one right after with boltsman factor

Reply 42

Polyrogue

2

Original post by VlAd x

What did u do for the one with wide range of values of helium energy and the one right after with boltsman factor

I guessed it was talking about Brownian motion, and so how all the particles would be randomly colliding and exchanging momentum and energy. Could be wrong.

And to the other guy about the exponential disprove, I found that the p.d halved at like 2 s, from 6V to 3V, but then at 4s (i.e. supposedly 2 half lives later) it went down to 1V instead of 1.5V.

Idk if that's right but it makes sense.

Reply 43

danthebox

OP

1

paper was fine i thought, apart from the 10 mark question using the vacuum, absolute crap honestly.

Reply 44

danthebox

OP

1

Original post by danthebox

paper was fine i thought, apart from the 10 mark question using the vacuum, absolute crap honestly.

i hope they take 10 marks off of the usual mark for an A.

Reply 45

danthebox

OP

1

Original post by Polyrogue

I guessed it was talking about Brownian motion, and so how all the particles would be randomly colliding and exchanging momentum and energy. Could be wrong.

And to the other guy about the exponential disprove, I found that the p.d halved at like 2 s, from 6V to 3V, but then at 4s (i.e. supposedly 2 half lives later) it went down to 1V instead of 1.5V.

Idk if that's right but it makes sense.

half lives were not constant, therefore wasn't exponential decay. i.e. 6 to 3 was 2 seconds, 3 to 1.5 was 4 seconds.