Hey all, sorry for that huge wait - the turning points mark scheme is finally finished. I've had so much to do this week, huge apologies for the inconvenience again.

Here it is!

Hope it helps!

Good luck all!

cheers for this!

Reply 1303

Abc321zxc

how do you get 3.875 for the work function value?

Reply 1304

PressTabStart

6

I just realized I made a really stupid mistake on the gas question. probably. idk. In the first part I think I divided by the number of mols instead of multiplying. Maybe. It's only 2 marks right?

Reply 1305

jamiemok

What do people think it would be for an A for section a?

Posted from TSR Mobile

Reply 1306

allofthestars

13

I did astro and personally I think that`s a fair a* boundary, maybes around 53 for an A. there was a lot of wordy questions this year for astro. I dunno if you would agree?

Reply 1307

marioman

8

Original post by allofthestars

I did astro and personally I think that`s a fair a* boundary, maybes around 53 for an A. there was a lot of wordy questions this year for astro. I dunno if you would agree?

I agree that there were a lot of written answers needed in Astro but everything except the last page was completely standard. "Compare the stars" was probably the best 6 mark question that could have been set, and the CCD structure/operation has been asked many times in the past.

Reply 1308

allofthestars

13

Original post by marioman

I agree that there were a lot of written answers needed in Astro but everything except the last page was completely standard. "Compare the stars" was probably the best 6 mark question that could have been set, and the CCD structure/operation has been asked many times in the past.

so what would you think the A grade mark will be ?

Reply 1309

marioman

8

Original post by allofthestars

so what would you think the A grade mark will be ?

Maybe 55 or 56? Depends how people found Section A really.

Reply 1310

allofthestars

13

Original post by marioman

Maybe 55 or 56? Depends how people found Section A really.

Interesting, its quite a hard one to say really, as looking through past mark schemes there seems to be two different style papers. Ones that get 51-52-53 ish A boundaries, others than get 55- 56 . Comparing the A section personally I thought that paper corresponded well with the 52-53 ish boundary but having seen what you said I do agree that as well it "might" be higher. Its hard to tell Im confused now haha

How did you personally find it?

Reply 1311

Hdnvwizndb

4

For the work function question on turning points I used eV=hf-w therefore w=hf-eV and using the numbers given I got 3.675 not 3.875. Help ?????

Reply 1312

marioman

8

Original post by allofthestars

Interesting, its quite a hard one to say really, as looking through past mark schemes there seems to be two different style papers. Ones that get 51-52-53 ish A boundaries, others than get 55- 56 . Comparing the A section personally I thought that paper corresponded well with the 52-53 ish boundary but having seen what you said I do agree that as well it "might" be higher. Its hard to tell Im confused now haha

How did you personally find it?

I thought it was definitely on the easy side but not the most straightforward.

Reply 1313

MCPC247

8

Original post by Hdnvwizndb

For the work function question on turning points I used eV=hf-w therefore w=hf-eV and using the numbers given I got 3.675 not 3.875. Help ?????

I did the same thing, are you sure 3.875 is correct?

Reply 1314

Jay1421

2

Original post by MCPC247

I did the same thing, are you sure 3.875 is correct?

Original post by Hdnvwizndb

For the work function question on turning points I used eV=hf-w therefore w=hf-eV and using the numbers given I got 3.675 not 3.875. Help ?????

Hey guys, sorry - I didn't recalculate it when I was writing out the mark scheme as I was rushing - I think you're both correct in saying it is 3.675x10^-19J.

Sorry for confusing anybody! It was from memory :frown:

Reply 1315

DesignPredator

9

A bit late but was the answer to the last astro calculation 2.37x10^14 AU?

Reply 1316

GrandMasti

11

Original post by DesignPredator

A bit late but was the answer to the last astro calculation 2.37x10^14 AU?

Yes it was :-)

Reply 1317

notanooblol

2

]Anybody do OCR chemistry, AQA physics or OCR MEI Further Maths?
Predictions for A* grade boundaries/full ums?
My Predictions:
F324 A*: 54/60
F325 A*: 85/100
PHYA4 A*: 59/75
PHYA5 A*: 60/75
DE full ums: 72/72
FP1 full ums: 70/72
FP2 full ums: 70/72??
M2 full ums: 70/72
S2 full ums: 72/72
S3 full ums: 72/72
Edits and replies will be appreciated

Reply 1318

boyyo

6

Original post by notanooblol

]Anybody do OCR chemistry, AQA physics or OCR MEI Further Maths?
Predictions for A* grade boundaries/full ums?
My Predictions:
F324 A*: 54/60
F325 A*: 85/100
PHYA4 A*: 59/75
PHYA5 A*: 60/75
DE full ums: 72/72
FP1 full ums: 70/72
FP2 full ums: 70/72??
M2 full ums: 70/72
S2 full ums: 72/72
S3 full ums: 72/72
Edits and replies will be appreciated

what optional unit did you do for phya5? (Please dont say astro :/)