# 2016 AQA Physics Unit 1 - Unofficial Mark schemeWatch

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2 years ago
#261
(Original post by charliej2802)
Did anyone else put 22 degrees, think i messed it up
I got this too and then I added it to 100oC as it said final temperature! I don't know what I did
0
2 years ago
#262
(Original post by SunnyBoys)
Surely if you decrease volume, there is less surface area, so there is a slower rate of evaporation.
decreasing volume has no affect on surface area. The conatiner shape stays the same
0
2 years ago
#263
(Original post by dhruvap)
I still don't get the increasing VOLUME question and how it affects the rate of evaporation. Faster or slower?
Less volume means it's easier for liquid to evaporate as less energy is needed to heat the liquid as a whole
0
2 years ago
#264
(Original post by Mahrez)
no the change in temp was 20-13= 7, this occured over a period of 100 seconds
7/100=0.07
Would I get any marks for reading the graphs as 6.8 rather than 7?
0
2 years ago
#265
(Original post by lilymarston)
I got this too and then I added it to 100oC as it said final temperature! I don't know what I did
Prob get 2/3 marks...we messed up,last step
0
2 years ago
#266
(Original post by Alfieee)
Would I get any marks for reading the graphs as 6.8 rather than 7?
You might get method mark or 'inclusive marks eg range' but I am pretty sure you will get 1
0
2 years ago
#267
what does anyone think the grade boundaries will be?
0
2 years ago
#268
why is that calculation thing 0.07 and not 7...
0
2 years ago
#269
for the question about the gas flame and why it was inefficient, did anyone else but that some energy was lost by the waste product of light? Or is that completely wrong
0
2 years ago
#270
(Original post by Alfieee)
Would I get any marks for reading the graphs as 6.8 rather than 7?
would i get a mark for 7 tho
0
2 years ago
#271
(Original post by coreHelp)
why is that calculation thing 0.07 and not 7...
It decreased by 7 degrees in 100 seconds and asked you what the rate of temperature decrease was per second so you had to divide 7 by 100 (0.07)
0
2 years ago
#272
(Original post by coreHelp)
would i get a mark for 7 tho
yes
0
2 years ago
#273
(Original post by coreHelp)
i got the same answer but u know the unit was in W, however the time was in hours.. so i guess we had to convert it.. but it was just a 2 marker so idkk
Same. Totally forgot about the conversion! Blanked on joules etc!
0
2 years ago
#274
[QUOTE=ihatehannah;65157611]

then 0.07 degrees/s

Did anyone else get 0.0625 for this?
(20-13.75)/100
0
2 years ago
#275
I got all the calculations ones wrong 😔
0
2 years ago
#276
did people generally find this paper easier than last year's?
0
2 years ago
#277
(Original post by Mahrez)
You might get method mark or 'inclusive marks eg range' but I am pretty sure you will get 1
Oh ok thanks - better than nothing I guess
0
2 years ago
#278
(Original post by Bushmill)
for the question about the gas flame and why it was inefficient, did anyone else but that some energy was lost by the waste product of light? Or is that completely wrong
Erm I think you would get 1 mark out of two
0
2 years ago
#279
Check my latest thread for a full, fairly accurate mark scheme.
0
2 years ago
#280
(Original post by PrinceKian)
Erm I think you would get 1 mark out of two
I said this saucepan less surface area than frying pan so smaller rate of heat transfer also some of the energy produced by gas flame is transfered to the surroundings
0
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