[Frankster]

How was it? I didn't find it as bad as P3, but you never know! Discuss here and please post the unofficial mark scheme here!!

[EvilAligator]

Definitely not as bad as P3- that was a horrible exam. Nothing too bad I didn't think, except I put that a beta particle is an electron from the outer shell but apparently it's from the nucleus... Oops XD

[clare1111]

I thought it was okay! A lot different from other past papers.. As there was a lot of writing! Hope it went okay for you all

[bezabe]

Yep, definitely much happier after the P3 horror show. Just a bit uncertain on some things, like was it 25 hours that the gas burner lasted for? And what happens to the waste energy? Other than small things like that it was fine.

[EvilAligator]

(Original post by bezabe)
Yep, definitely much happier after the P3 horror show. Just a bit uncertain on some things, like was it 25 hours that the gas burner lasted for? And what happens to the waste energy? Other than small things like that it was fine.

I, uh, put 200. Awk.
And the waste energy goes to waste heat and noise that is lost in the air. At least, that's what I put.

[bezabe]

(Original post by EvilAligator)
I, uh, put 200. Awk.
And the waste energy goes to waste heat and noise that is lost in the air. At least, that's what I put.

I got 200kWh for the energy used, but then for the number of hours it lasted, I did, E=pt, so t=e/p = 200/8(power used by the boiler as stated in the information), which gave 25. But I may have been wrong.

[Frankster]

(Original post by bezabe)
I got 200kWh for the energy used, but then for the number of hours it lasted, I did, E=pt, so t=e/p = 200/8(power used by the boiler as stated in the information), which gave 25. But I may have been wrong.

Yep that's what I got.

(Original post by EvilAligator)
Definitely not as bad as P3- that was a horrible exam. Nothing too bad I didn't think, except I put that a beta particle is an electron from the outer shell but apparently it's from the nucleus... Oops XD

I crossed out outer shell at the last minute and put in nucleus!!

(Original post by bezabe)
Yep, definitely much happier after the P3 horror show. Just a bit uncertain on some things, like was it 25 hours that the gas burner lasted for? And what happens to the waste energy? Other than small things like that it was fine.

I think it was 25 hours.

[EvilAligator]

(Original post by bezabe)
I got 200kWh for the energy used, but then for the number of hours it lasted, I did, E=pt, so t=e/p = 200/8(power used by the boiler as stated in the information), which gave 25. But I may have been wrong.

Ah. Maybe that was it. I think I misunderstood the 15p/£30 thing.
Oh but the boiler doesn't use 8kW/h- it only uses 7.6kW/h, which was the answer to the last question. I think?

[EvilAligator]

(Original post by Frankster)
I crossed out outer shell at the last minute and put in nucleus!!

Well g'damn. Nice one! Thought it was too obvious... XD

[clare1111]

Unofficial markscheme anybody? I would do it but my memory is terrible! And I'm sure 200 would get you one mark

[Frankster]

(Original post by EvilAligator)
Well g'damn. Nice one! Thought it was too obvious... XD

Haha! Luck was on my side today. It had to be after my poor P3! haha...

[Frankster]

I drew the analogue graph as an alternating current graph, but I drew the digital graph as bar chart graph (as in I drew it properly with spaces between bars). Would I lose 1 mark then for drawing the incorrect analogue graph?

[ClarkyC...]

I gt 2.5 for the energy question. (did pennies wrong haha) would I get one mark? I showed quite a lot of working. Also what did people get for the last question on alf life? I think I may have got that wrong. Other than that though not a bad exam, a lot better than the nervous breakdown I nearly had in P3

[Frankster]

(Original post by ClarkyC...)
What did people get for the last question on alf life? I think I may have got that wrong. Other than that though not a bad exam, a lot better than the nervous breakdown I nearly had in P3

It's 90 years for the last question.

[ClarkyC...]

(Original post by Frankster)
It's 90 years for the last question.

Okay so what about the energy question, 1 mark possible?

[bezabe]

(Original post by EvilAligator)
Ah. Maybe that was it. I think I misunderstood the 15p/£30 thing.
Oh but the boiler doesn't use 8kW/h- it only uses 7.6kW/h, which was the answer to the last question. I think?

No, I don't think so. I originally used 7.6 but then put 8 because it uses 8kW regardless of how much is converted into useful energy.

[Frankster]

(Original post by ClarkyC...)
Okay so what about the energy question, 1 mark possible?

I think so, because depending upon your working you should be safe...

(Original post by bezabe)
No, I don't think so. I originally used 7.6 but then put 8 because it uses 8kW regardless of how much is converted into useful energy.

it asked you how much energy goes into heating water.. so i think 7.6 is correct = 0.95 x 8

[xoxlovelifexox]

(Original post by Frankster)
I think so, because depending upon your working you should be safe...



it asked you how much energy goes into heating water.. so i think 7.6 is correct = 0.95 x 8

i got 7.6

[Frankster]

(Original post by xoxlovelifexox)
i got 7.6

Yeah it's right.. i really hope i don't cock this one up as well!

[MichelleQ]

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