I thought L cant be 0 cause other PV=nrt doesnt apply because they'd be no volume so I put mine positive constant gradient starting further down the x axis?(Original post by sadasdasdasd)
M proportional to pressure and L is proportional to volume therefore graph is a straight line through the original.

 Follow
 61
 15062017 11:59

Revision help in partnership with Birmingham City University

emmabrindley1
 Follow
 0 followers
 0 badges
 Send a private message to emmabrindley1
Offline0ReputationRep: Follow
 62
 15062017 12:01
(Original post by A sad Man)
I thought L cant be 0 cause other PV=nrt doesnt apply because they'd be no volume so I put mine positive constant gradient starting further down the x axis? 
 Follow
 63
 15062017 12:43
Anyone get 1.2 for the last question?

 Follow
 64
 15062017 12:52
(Original post by emmabrindley1)
what do you reckon the grade boundaries will be ?
I reckon b 3741 4142a, 4647 a* 
 Follow
 65
 15062017 12:54
(Original post by Jack077)
Anyone get 1.2 for the last question? 
 Follow
 66
 15062017 13:07
(Original post by sadasdasdasd)
dunno exactly what the questions are in order, or the numbers, but can remember the method probably
1) strontium and alpha nucleus
a) velocity of alpha nucleus
energy and mass given therefore 1/2*m*v^2
b) newtons laws to explain motion of strontium
strontium experiences a force as alpha particle experiences a change in momentum?
Repulsion between the two are equal and opposite, also act on each others bodies?
c) calculate v of strontium
M(initial)*v(initial) = M(final)^v(final)
2) ?
3)
4)
5)Thermal physics
a) work out initial n of baloon
use 4/3*pi*r^3 and PV=nRT using initial T, P
b) work out final pressure of baloon before it pops
use 4/3*pi*r^3 for new V and PV=nRT using final T, initial n, final V
c) ratio question
E=3/2KT therefore ratio is T(final)/T(initial)
Help.. pls
2) SHM
 Straight line through the origin suggests SHM
 Why the mass attached to spring went towards the outside when rotated
 State the vertical axis. =v^2 (the graph was in the form v^2=(k/m)R^2. [Derived from F=kR, F=mv2/R.])
 Calculate units for k =kg s^2
 Calculate k/m (i.e. the gradient.) (they gave units of s^2, confirming previous answer.)
 How the mass could be determined (gradient=k/m [k was known], m=(k)/gradient.)
 Experiment for R, F and v using video camera and ruler.
3) Gravity
Mass of Mars is 9.3 times less that of Earth. Mars radius=3400km, Earth radius=6400km
 Calculate g on Mars (I did a lot of working these 2 marks. I certainly over complicated things.)
 Comparison of a probe taking off from the surface of Mars compared to Earth (Resultant force difference due to gravity air resistance.)
 3 Properties for the satellite to remain in the same point above Mars (Equatorial orbit, period = Marian time, same direction as Mars rotation.)
 Calculate the radius of satellite (Using, T^2=(4pi^2/GM)r^3. With the mass of Mars calculated before [6.48x10^23 kg])
 The other satellite had a polar orbit with a particular distance above Mars. Calculate the number of pictures taken per second. (They gave the number of total pictures. [Around 3000.]) (Determine period using T^2 equation [r=radius of Mars+distance above surface] then divide total number by the period.) (answer = 527?).
4) Photon energy, E=mc(theta).
45mA of 130keV electrons for 1.6s.
 Calculate [confirm] the number of electrons [equals 5x10^17]. (=It/e=(45x103)(1.6)/(1.6x1019)=4.5x10^17 electrons)
 Calculate wavelength. (E=130keV=2.08x1014J. E=hc/wavelength>wavelength=9.56x1012 m)
Water cooled thing down by 90%. c=4200, initial temp=17c, final temp=27c, density of the water=1000kgm^3[?]
 Calculate volume of water per second. (Energy cooled by water=(0.9)(number of electrons)(energy of electron)=(0.9)(5x10^17)(2.08x1014)=9360 J. E=mc(theta)>m=E/c(theta)=(9360)/(4200)(2717)=0.22 kg. m per second=(0.22)/(1.6)=0.139 kgs1. volume per second=(0.139)/1000= 1.39x104 m^3 s^1 [Not entirely sure about this one due to forgetting the density.]Last edited by headyb; 15062017 at 13:41. 
 Follow
 67
 15062017 13:53
For question one did anyone get like 1.6x10^7 which is approx 2x10^7 cus that seemed a bit off

 Follow
 68
 15062017 14:14
(Original post by Super199)
For question one did anyone get like 1.6x10^7 which is approx 2x10^7 cus that seemed a bit off 
 Follow
 69
 15062017 14:46
(Original post by adsy9)
I did, thought it was some terrible rounding on their part 
 Follow
 70
 15062017 15:27
(Original post by headyb)
I'll see how much I can recall. Unfortunately, I can't quite remember all the numbers, feel free to chime in if anyone else does.
2) SHM
 Straight line through the origin suggests SHM
 Why the mass attached to spring went towards the outside when rotated
 State the vertical axis. =v^2 (the graph was in the form v^2=(k/m)R^2. [Derived from F=kR, F=mv2/R.])
 Calculate units for k =kg s^2
 Calculate k/m (i.e. the gradient.) (they gave units of s^2, confirming previous answer.)
 How the mass could be determined (gradient=k/m [k was known], m=(k)/gradient.)
 Experiment for R, F and v using video camera and ruler.
3) Gravity
Mass of Mars is 9.3 times less that of Earth. Mars radius=3400km, Earth radius=6400km
 Calculate g on Mars (I did a lot of working these 2 marks. I certainly over complicated things.)
 Comparison of a probe taking off from the surface of Mars compared to Earth (Resultant force difference due to gravity air resistance.)
 3 Properties for the satellite to remain in the same point above Mars (Equatorial orbit, period = Marian time, same direction as Mars rotation.)
 Calculate the radius of satellite (Using, T^2=(4pi^2/GM)r^3. With the mass of Mars calculated before [6.48x10^23 kg])
 The other satellite had a polar orbit with a particular distance above Mars. Calculate the number of pictures taken per second. (They gave the number of total pictures. [Around 3000.]) (Determine period using T^2 equation [r=radius of Mars+distance above surface] then divide total number by the period.) (answer = 527?).
4) Photon energy, E=mc(theta).
45mA of 130keV electrons for 1.6s.
 Calculate [confirm] the number of electrons [equals 5x10^17]. (=It/e=(45x103)(1.6)/(1.6x1019)=4.5x10^17 electrons)
 Calculate wavelength. (E=130keV=2.08x1014J. E=hc/wavelength>wavelength=9.56x1012 m)
Water cooled thing down by 90%. c=4200, initial temp=17c, final temp=27c, density of the water=1000kgm^3[?]
 Calculate volume of water per second. (Energy cooled by water=(0.9)(number of electrons)(energy of electron)=(0.9)(5x10^17)(2.08x1014)=9360 J. E=mc(theta)>m=E/c(theta)=(9360)/(4200)(2717)=0.22 kg. m per second=(0.22)/(1.6)=0.139 kgs1. volume per second=(0.139)/1000= 1.39x104 m^3 s^1 [Not entirely sure about this one due to forgetting the density.] 
 Follow
 71
 15062017 16:33
(Original post by yelash)
Slightly worried as I don't have any recollection of your Q3! 
 Follow
 72
 15062017 16:34
(Original post by Jack077)
Anyone get 1.2 for the last question? 
 Follow
 73
 15062017 17:09
(Original post by A sad Man)
Lol I couldn't work out mass of earth because I was in a rush so I just wacked on 6X10^24 because i remembered it from practise questions, So unless they accept that, I've pretty much lost the entire question apart from explanations 
sadasdasdasd
 Follow
 0 followers
 2 badges
 Send a private message to sadasdasdasd
Offline2ReputationRep: Follow
 74
 15062017 18:58
(Original post by headyb)
I'll see how much I can recall. Unfortunately, I can't quite remember all the numbers, feel free to chime in if anyone else does.
2) SHM
 Straight line through the origin suggests SHM
 Why the mass attached to spring went towards the outside when rotated
 State the vertical axis. =v^2 (the graph was in the form v^2=(k/m)R^2. [Derived from F=kR, F=mv2/R.])
 Calculate units for k =kg s^2
 Calculate k/m (i.e. the gradient.) (they gave units of s^2, confirming previous answer.)
 How the mass could be determined (gradient=k/m [k was known], m=(k)/gradient.)
 Experiment for R, F and v using video camera and ruler.
3) Gravity
Mass of Mars is 9.3 times less that of Earth. Mars radius=3400km, Earth radius=6400km
 Calculate g on Mars (I did a lot of working these 2 marks. I certainly over complicated things.)
 Comparison of a probe taking off from the surface of Mars compared to Earth (Resultant force difference due to gravity air resistance.)
 3 Properties for the satellite to remain in the same point above Mars (Equatorial orbit, period = Marian time, same direction as Mars rotation.)
 Calculate the radius of satellite (Using, T^2=(4pi^2/GM)r^3. With the mass of Mars calculated before [6.48x10^23 kg])
 The other satellite had a polar orbit with a particular distance above Mars. Calculate the number of pictures taken per second. (They gave the number of total pictures. [Around 3000.]) (Determine period using T^2 equation [r=radius of Mars+distance above surface] then divide total number by the period.) (answer = 527?).
4) Photon energy, E=mc(theta).
45mA of 130keV electrons for 1.6s.
 Calculate [confirm] the number of electrons [equals 5x10^17]. (=It/e=(45x103)(1.6)/(1.6x1019)=4.5x10^17 electrons)
 Calculate wavelength. (E=130keV=2.08x1014J. E=hc/wavelength>wavelength=9.56x1012 m)
Water cooled thing down by 90%. c=4200, initial temp=17c, final temp=27c, density of the water=1000kgm^3[?]
 Calculate volume of water per second. (Energy cooled by water=(0.9)(number of electrons)(energy of electron)=(0.9)(5x10^17)(2.08x1014)=9360 J. E=mc(theta)>m=E/c(theta)=(9360)/(4200)(2717)=0.22 kg. m per second=(0.22)/(1.6)=0.139 kgs1. volume per second=(0.139)/1000= 1.39x104 m^3 s^1 [Not entirely sure about this one due to forgetting the density.]
first part of 3) was weird, I just calculated mass of marks first then used that for the next parts
no. of photos for 3) I got 1670 3.s.f.
density for 4) for 1000kgm^3
everything there I got the same pretty muchLast edited by sadasdasdasd; 15062017 at 20:02. Reason: same 
 Follow
 75
 15062017 19:35
(Original post by A sad Man)
Lol I couldn't work out mass of earth because I was in a rush so I just wacked on 6X10^24 because i remembered it from practise questions, So unless they accept that, I've pretty much lost the entire question apart from explanations
Oh well hopefully I'm just blocking the pain of rememebring wrong answers from my brainLast edited by yelash; 15062017 at 19:37. 
 Follow
 76
 15062017 20:44
(Original post by sadasdasdasd)
for the first part of 2) the direction of the springs acceleration and extension were oppositely directed, this was the first reason for SHM
first part of 3) was weird, I just calculated mass of marks first then used that for the next parts
no. of photos for 3) I got 1670 3.s.f.
density for 4) for 1000kgm^3
everything there I got the same pretty much(Original post by A sad Man)
Lol I couldn't work out mass of earth because I was in a rush so I just wacked on 6X10^24 because i remembered it from practise questions, So unless they accept that, I've pretty much lost the entire question apart from explanations
http://i.imgur.com/J1R0RPB.jpg 
clear_water
 Follow
 0 followers
 1 badge
 Send a private message to clear_water
Offline1ReputationRep: Follow
 77
 19062017 10:07
Does anyone have the 2016 papers?

sadasdasdasd
 Follow
 0 followers
 2 badges
 Send a private message to sadasdasdasd
Offline2ReputationRep: Follow
 78
 19062017 10:32
(Original post by clear_water)
Does anyone have the 2016 papers? 
 Follow
 79
 19062017 12:19
Have they increased the time for the G485 paper. Because I did it last year and I'm retaking this year and every paper so far has beem 1h 45mins but the place where I am doing it says 120mins (2h). Is it possible the college just gave extra time?

sadasdasdasd
 Follow
 0 followers
 2 badges
 Send a private message to sadasdasdasd
Offline2ReputationRep: Follow
 80
 19062017 12:27
(Original post by k_nikolov)
Have they increased the time for the G485 paper. Because I did it last year and I'm retaking this year and every paper so far has beem 1h 45mins but the place where I am doing it says 120mins (2h). Is it possible the college just gave extra time?
Related university courses

Physics with Particle Physics & Cosmology
Swansea University

Physics
University of York

Physics
HeriotWatt University

Physics
University of Hull

Environmental Science and Physics
Keele University

Mathematics and Theoretical Physics
University of St Andrews

Physics with Astrophysics with Professional and Research Placements
University of Bath

Physics with Astrophysics with Science Foundation Year
Keele University

Physics with Nuclear Technology BSc Hons (Sandwich)
University of the West of Scotland

Theoretical Physics (4 years)
University of Birmingham
We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.
 charco
 Mr M
 Changing Skies
 F1's Finest
 rayquaza17
 Notnek
 RDKGames
 davros
 Gingerbread101
 Kvothe the Arcane
 TeeEff
 The Empire Odyssey
 Protostar
 TheConfusedMedic
 nisha.sri
 claireestelle
 Doonesbury
 furryface12
 Amefish
 harryleavey
 Lemur14
 brainzistheword
 Rexar
 Sonechka
 TheAnxiousSloth
 EstelOfTheEyrie
 CoffeeAndPolitics
 an_atheist
 Labrador99
 EmilySarah00
 thekidwhogames
 entertainmyfaith
 Eimmanuel