Its fine bro , i f***ed up this paper. Just hoping an A is like 50 or something for both papers. I messed up on the question on about moments , and its supposed to be really easy as well :/

Reply 465

money-for-all

Original post by BethFM

Predictions for grade boundaries?

13 for an A
6 for a B
anything less than 6 your pretty much going to have to submit your C.V to various catering institutions.
For example, MacDonalds

Reply 466

PawanAviator

What did people put for the last part on the question on about seismometers?? about it moving "downwards quickly". I didn't even understand that :/

Reply 467

CBPAS

Original post by BethFM

It was 2.7,
people got 1.7 because they took zero to be the start of the metal scale, when you had to actually calculate from the zero line on the scale (ie like measuring with a ruler and aligning the end of the ruler with the thing you are measuring as opposed to aligning it at the 0 division)
I got that first then realised it was wrong

Wouldn't you have to put 3mm because you can't give the answer to a higher degree of accuracy than the error in the reading?

Reply 468

money-for-all

some guy in my school started writing about the photoelectric effect in the multiple choice question?
he was high tho'

Reply 469

Exavior

Original post by CBPAS

Did anyone else find todays paper hard to complete in the time limit?

Yes I didnt answer 15 marks worth in questions.

Reply 470

GitFace93

Original post by Chickenslayer69

You use suvat to find the maximum height reached, with v = 0 since this will give the maximum height of the ball.

s = ? u = ? v = 0 a = -1.6ms^2 t = 4

Using s = vt - 1/2at^2, you should get that s = about 13m, and the closest approximation to this was 15m.

4 seconds to complete the whole movement, but only 2 seconds to maximum height, hence making s=1/at^2 = sqrt(2*2*1.6) = 2.5m

Reply 471

stevenp99

Original post by CBPAS

Did anyone else find todays paper hard to complete in the time limit?

oh yeah, when they said time was up i hadn't completed around 2/3's of the multiplee choice, their goes my chance of a good physics grade!

Reply 472

GitFace93

Original post by stevenp99

Their was a question with a graph of G against temperature and you had to work out alpha, what did you get and how?

using y=mx+c or y-y1=m(x-x1) you get like 10.56 or something, but on the graph it was obvsiouly 2.2... however, the x axis was broken hence meaning 10.56 was correct. stick with your maths. i didnt, rip me.

(take 2 points, i used like (280,-0.4) and (220,1.9) and use basic slope geometry to figure it out)

Reply 473

DecemberLilyCat

Original post by CBPAS

Wouldn't you have to put 3mm because you can't give the answer to a higher degree of accuracy than the error in the reading?

No the precision of a vernier is 1/10th of a mm that is the whole point of using one so you can measure to better accuracy than 1mm

Reply 474

stevenp99

Original post by GitFace93

I got just under 2.2, is that right or nah? cause i got alpha as the y intercept

Reply 475

CBPAS

Original post by BethFM

No the precision of a vernier is 1/10th of a mm that is the whole point of using one so you can measure to better accuracy than 1mm

There goes another mark

Reply 476

GitFace93

Original post by stevenp99

I got just under 2.2, is that right or nah? cause i got alpha as the y intercept

i put it as 2.2 like you, but I'm afraid to say it isn't. around 10.6 is the correct answer

Reply 477

GitFace93

aqa are so cancer for putting in a V-I characteristic not a I-V... multiple choice at the end-ish? anyone say it acted like a thermistor so answer was C?

Reply 478

the_malis

Anyone got any predictions for the grade boundaries?
Hoping this pulls up my effort from the first exam.

Reply 479

11234

Original post by GitFace93

aqa are so cancer for putting in a V-I characteristic not a I-V... multiple choice at the end-ish? anyone say it acted like a thermistor so answer was C?