ALL CIE PHYSICS DOUBTS HERE !!!

[Ghost Of Highbury]

How are you studying for paper 5?
Are you studying experiments? cz I dont know where to find them :S
Didnt go into school labs .. soo If you could share some resources I would appreciate it!

Just go through all the past papers, markschemes and examiner reports. Read all the experiments described in the book

and read the examiner tips from cambridge students. if u have the physics coursebook, there's a section in the end of the book for physics paper 5 particularly

[whale95]

Please check attachment for the Question!


Thanks for answering!

[astarmathsandphysics]

here

[baditude]

Hey can someone help me with o/n 2005 questions 3b(i) why is the work done on the system positive and q4 b
Thanks

[astarmathsandphysics]

which paper

[silvercameron]

this one's from nuclear physics:
if (dN/dt) is directly proportional to N, then when we write the equation as (dN/dt)= (-lambda)t, where lamda is the decay constant, why does the constant have the negative sign before it?

This one is from ideal gases:
how is the equation pV=nkT derived?

[kruti1996]

Hi people,
 please help me out with June 2012, paper 11, question 12.
thank you

[astarmathsandphysics]

this one's from nuclear physics:
if (dN/dt) is directly proportional to N, then when we write the equation as (dN/dt)= (-lambda)t, where lamda is the decay constant, why does the constant have the negative sign before it?

This one is from ideal gases:
how is the equation pV=nkT derived?

N is decreasing so dN is negative. dN is the change in N in a time period dt. If N is decreasing, at the end of the time period there are less atoms than at the start.

[astarmathsandphysics]

Hi people,
 please help me out with June 2012, paper 11, question 12.
thank you

[astarmathsandphysics]

how is the equation pV=nkT derived?

here

http://www.astarmathsandphysics.com/a_level_physics_notes/thermal_physics_and_gases/a_level_physics_notes_kinetic_theory_of_gases.html

[Tasrina]

can someone please give me all the derivations for A2 physics. Thanks...

[astarmathsandphysics]

Which derivation?

[Tasrina]

can some1 tell me all the derivations for A2 physics.thanks

[Tasrina]

lists of derivation needed for A2 level phy.Thanks

[astarmathsandphysics]

There is no complete list because a dertivation can depend on the quesation but you should be able to prove
1. pV/T=constant
2. pV=nRT3.
3. KE=3/2 kT
4. Energy of planet in orbit = 1/2 GPE
5. R^3 = k T^2 for planet in orbit
6. Period of geostationary orbit
7. r=mv/Bq for circular motion in electric field

There may be others.
I will add to this list.