Physics: Post your doubts here!

[Thought blocker]

so my graph is correct ? Oh my, what language are you using? hehe, which line should touch 3T?

-_- Continue from where you ended.

 

[Zepudee]

-_- Continue from where you ended.

OHH sorry haha! Thanks dude!

 

[Thought blocker]

OHH sorry haha! Thanks dude!

No problem at all

 

[Thought blocker]

OHH sorry haha! Thanks dude!

More doubts?

 

[Zepudee]

Thought blocker im so sorryyy but mind helping me with this heh heh. this is winter 06 q6 (b) i think i drew it wrongly so yeah

 

[Thought blocker]

Thought blocker im so sorryyy but mind helping me with this heh heh. this is winter 06 q6 (b) i think i drew it wrongly so yeah

My net is damn slow. I need to go.
Ask ZaqZainab

 

[Llamas]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_qp_1.pdf

Question 15 and 25, please. :/

 

[Llamas]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_qp_1.pdf

And question 29, I can't seem to understand it.

 

[ZaqZainab]

My net is damn slow. I need to go.
Ask ZaqZainab

I didn't start my A2 yet

 

[ZaqZainab]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_qp_1.pdf

Question 15 and 25, please. :/

Q15
not only did container X lose half the height even the mass became half
so m now will be m/2
and h will be h/2
g stays the same
we now have mgh/4

Q25 N lines per metre means 1/N and then substituting into the equation it will be (1/N) sin (theta)= n ( lambda)
sin theta/lamda is also = sin theta/((1/N) sin (theta)/n) solving it further gives Nn (if you don't know how to solve further let me know)

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_qp_1.pdf

And question 29, I can't seem to understand it.

Q29 v^2 = 2as
a=F/m
F= EQ means Ee as in the question
so v^2=2*(Ee/m)*s
v^2/2=(Ee/m)*x
making x the subject
(v^2/2)/(Ee/m)=x
which equates to x=v^2*m/2Ee

 

[Thought blocker]

I didn't start my A2 yet

No problem.
Zepudee its better You tell me which paper n which question. I will draw graph n send it to you.

 

[Thought blocker]

I didn't start my A2 yet

No problem.
Zepudee its better You tell me which paper n which question. I will draw graph n send it to you.

 

[Llamas]

http://www.sheir.org/a-level-physics-12-nov2009.pdf

Question 28, please!

 

[Thought blocker]

http://www.sheir.org/a-level-physics-12-nov2009.pdf

Question 28, please!

28)
F= Eq
F = 3 x 10^7 x 1.6 x 10 ^(-19)
F = A

 

[Llamas]

Q15
not only did container X lose half the height even the mass became half
so m now will be m/2
and h will be h/2
g stays the same
we now have mgh/4

Q25 N lines per metre means 1/N and then substituting into the equation it will be (1/N) sin (theta)= n ( lambda)
sin theta/lamda is also = sin theta/((1/N) sin (theta)/n) solving it further gives Nn (if you don't know how to solve further let me know)



Q29 v^2 = 2as
a=F/m
F= EQ means Ee as in the question
so v^2=2*(Ee/m)*s
v^2/2=(Ee/m)*x
making x the subject
(v^2/2)/(Ee/m)=x
which equates to x=v^2*m/2Ee

Thank you so much, this was really helpful!

 

[Llamas]

Thanks again, I keep overlooking small details and bothering you.

28)
F= Eq
F = 3 x 10^7 x 1.6 x 10 ^(-19)
F = A

 

[Zepudee]

http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w06_qp_4.pdf
Thought blocker thanks!

 

[Zepudee]

im sorry it is upside down but can you do the part (c) about the mean kinetic energy. the answer is just below the question Thought blocker

 

[Thought blocker]

Zepudee I will do it some other time. I am busy right now. I am sorry.

 

[Thought blocker]

Thanks again, I keep overlooking small details and bothering you.

No problem.