AQA Physics: PHYA1 Tuesday 19th May 2015 (AM) and PHYA2 Thursday 04th June 2015 (PM)x

I think we can all agree that nobody got the last question correct.

I do physics maths and graphics design AND im finding physics so hard. How the F**K do people that do physics, chem, bio and maths cope??? If ur doing all these three i would like to know what drugs your on sincerely *DIES BEFORE FINISHING*

what is the strangeness of K0?!?

I wish life was easier. Why do we have to be sheep and follow everyone. Whos coming with me to live in the jungles of madagascar

Did anyone mention taking V and A readings at known time intervals for one of the parts of that godawful potato question?

I got 32000W? A few people I've talked to have got that as the answer too, so I'm assuming it's correct.

1) definitions were fine
the table was ok
2 electrons lost
I think it was isotope 225
2) yes charged particle
Baryon
Not sure since strangeness, baryon and charge had to conserved
3) 6 mark was ok
Diagram was ok
4) proofing frequency was simple
Then working Ek was ok
Speed I got something to 10^5
5) Filament graph was ok
I put ohmic
Because less current gets trough to R lamp
6) POTATOES
Gradient 2. Something
Not sure about led I put yes
Messed up energy I did p=iv then q=it
7) I got something 10^-8 for resistivity
The aluminium had less resistance
Then p=v^2/r

Yep. The one that had the bigger power output must have had a higher resistance so more work done against this hence more energy dissipated as heat (if they both output the same light intensity). The lower energy one is therefore more efficient.

Yeah that's really annoying cause I'm sure my answer is wrong but I did all the working right. And yes I remembered to divide by the mass of the electron as well. Have no idea why my answer came out wrong!

I got 32000W? A few people I've talked to have got that as the answer too, so I'm assuming it's correct.

I think we can all agree that nobody got the last question correct.

I got 32000W? A few people I've talked to have got that as the answer too, so I'm assuming it's correct.

Oh gosh I know. ;((((((((((

ITS OKAY THOUGH, YOU CAN DO IT JADYS - Positivity.

Posted from TSR Mobile

i put non-ohmic for 6, as the resistance wasn't constat. defenition og ohmic is that V is directly preportional to I.

James

Nope
P=V^2/R so higher power had low resistance
Efficiency yes, but not because resistance was higher