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# Advancing Physics Synoptic Paper watch

1. (Original post by HollyJa)
im sorry, having a completely stupid moment, but how would you calculate force from the pressure graph?
using P=F/A . say the y axis was pressure, and the x axis area, u would just read of the values and times area and pressure

if ur talking about fig 7, then the only way you could do that is if you were given a specific area or force.
2. Area is something like 440km if you estimated it.

Using F= PA, you can obtain the answer, However you would need a pressure value. It said acting on Rutland, so at 0km above ground which is 100kPA

Force = 100x10³ * 440x10³ = Answer

Jamie
3. (Original post by JamieB)
Area is something like 440km if you estimated it.

Using F= P/A, you can obtain the answer, However you would need a pressure value.

Is average force halfway on the graph or what?

Jamie
its P = F/A

you would calculate the pressure for 0km (altitude)
4. Hehe, changed it before ya posted
5. (Original post by JamieB)
Hehe, changed it before ya posted

no you didnt :P....your was edited 11 mins ago, mine was posted 10 mins ago....
not that it matters ..heh
6. Well at least my maths is going as well as ma physics :P
7. huh?
8. 11 comes before 10 i was apparently trying to prove lol
9. (Original post by SunGod87)
I'll get the ball rolling:

Prove R³/T² is constant

Work out average force acting on Rutland (can be done from the pressure graph and the area from the map)

more?
P = 100 kPa at ground level. Say area of Rutland = 22km * 22km = 22000m * 22000m = 484000000m sq

F= P/A

F= 100000/484000000
F=0.00021 N

this correct?
10. how many quarks make up a
Proton
Neutron
11. 3 in each.

Proton = UUD
Neutron = UDD

I fink
12. 11 mins ago is before 10 mins ago. Just think 1 hour ago would be before half an hour ago.

Ma\$e
13. Meh im confused!!!
14. advantages and disadvantages of compuer modelling? challenge you all to some questions here!
15. and another one...Give example of differental equations that you have studied that can be solved by iteration techniques on a computer ( even if they can be solved algebrically)
2. Describe the differences between the two numerical approaches outlined in lines 108-122

Can examine a lot of data
Can prove a thereotical basis by calculation

Data obtained is only as valid as the model
Can take large resources/lots of money/lots of computers to model
17. thank u!

Nn = Inital input
Nt = Number of atoms after

Nt = Nn
for x = 1 to 10 '10 times
nt = Nte-^(lambda/t)
next x

Something like that in VB Code.

Numerical Approches use iteration of some form to provide a best guess, Computational models provide a theoretic basis, based on rules to provide more data.

Hard questions them...
19. Not saying their all correct, but id answer them like that..
20. sorry, last few questions i promise!
1. Suggest why spacial distribution is 11km?
2.Estimate the number cells above rutland
3.In what way is Ptolemys and Copernicus models not based on sound physical foundations?
4.The sun lies at one focus of the ellipse, what lies at teh other focus? ( that has been bugging me so much!)

Thank you so so much!

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