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# AQA GCSE Combined science Physics trilogy 23rd May 2018 Unofficial Markscheme watch

1. Q1) electron, atom, nucleus and orbit
Q2)0.07 *the long number
2. Hey, Just going to move this into the Physics exam forum as well as the GCSE forum so we can fill out the answers quicker!
3. what did everyone get for the radius question on Magnesium? You had to measure it with a ruler?
4. I got 1.583 x 10^-10. I measured it with a ruler
5. (Original post by lukeharris1505)
I got 1.583 x 10^-10. I measured it with a ruler
i got similar but i think i got 1.44 X 10 ^-10
6. what does 15mj mean
7. Also what did you guys get for the 6 marker to find charge?
8. 15x10^6 J
9. the mean question was 19.1
10. the last 6 marker was about ldr resistors
11. for the charge I got 2 and the unit was couloms but I am not sure
12. I got 15 for the charge but I'm not sure that's right
13. for the 25% one I did 80×0.75 which was 60 minutes is that right
14. (Original post by ibbyakram16)
for the charge I got 2 and the unit was couloms but I am not sure
Same here. If i'm correct, you use the formula p=I^2R and rearrange it so its I^2=P/R and then you square root the answer - giving me 2 C
15. The charge is 30 couloms.
16. I got 60 for the charge:
2 lamps with 3 Watts each
P=I squared r
So I ended up with 1 as the current
Q=it so 1 x 60 seconds
17. the practical question was easy was about density
you menna say
put the object on the balance and weigh it
then put it in a eureka can filled with water and place a measuring cylinder next to it the volume of the object is in the measuring cylinder plug the mass and volume into density equation and find out the density

how many marks do u think is that out of 6
18. (Original post by ibbyakram)
Q1) electron, atom, nucleus and orbit
Q2)0.07 *the long number
I got 21000000
19. Yeh that is right I got the Same as well that is question 2 you're talking about innit
20. (Original post by zacdavis123)
i got similar but i think i got 1.44 X 10 ^-10
Yeah I got something similiar.

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