Physics: Post your doubts here!

[Lucas Lee]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w11_qp_22.pdf
Hello, can someone explain the answer to 5b and why it results into a current. Thanks, i get the other parts to the question

 

[SIstudy]

V2-U2 = 2as

Initial is zero as it is dropped from rest. you need the final velocity
Acc of free ( or you may call it g) is always -9.81 whether No Air resistance or Air resistance
Distance is 4.5
so input it

V2= 2 (9.81) (4.5)
Dont forget to take root.. I even missed the V2 would go on the other side and Square root
V=9.4 ms-1

umm could yu explain the next part of the question
that is exactly what I asked fr

 

[SIstudy]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_21.pdf
Q1 b (ii) plis

 

[SIstudy]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_21.pdf
Q3 b (ii)
I knw you've done this ppr Physicist
but I couldn't get it
pls solve this fr me
thanks In advance

 

[JackAaron]

can anyone explain Physics Paper 4 M/J/2005 Qn. 7 c) asap thanks

 

[JackAaron]

and Physics Paper 4 M/J/2009 qn. 9 b)

 

[Zepudee]

Hi guys. Can anyone explain to me how an alternating current can flow through a capacitor and not permit a steady direct current to flow through it?

 

[Bba321]

Hey I am appearing for Physics paper 33 and I wanted to know if we are supposed to write units for the gradient and y intercept or not?
Thanks

 

[JackAaron]

http://physics-ref.blogspot.com/2014/09/9702-november-2009-paper-42-worked.html

i think u gave a wrong paper. Its May/June 09 not Oct/Nov :s

 

[Bba321]

Hi what does answers to the nearest mm mean on a metre rule? Thanks

 

[Bba321]

Hi.Do we take readings in m , cm or mm in practical?
Thanks

 

[shaminou]

Hi.Do we take readings in m , cm or mm in practical?
Thanks

It depends on the question. When you read the question see the units where you are supposed to give the answer and give your readings to this unit.

 

[Bba321]

What about short practical? I think they don't give the units

 

[shaminou]

What about short practical? I think they don't give the units

Then take readings using SI units.

 

[RoOkaYya G]

Hi.Do we take readings in m , cm or mm in practical?
Thanks

in m is better unless it says cm there
depends on question requirement too
if not specified m is better

 

[Bba321]

in m is better unless it says cm there
depends on question requirement too
if not specified m is better

Thanks

 

[Bba321]

It depends on the question. When you read the question see the units where you are supposed to give the answer and give your readings to this unit.

Thanks

 

[Thought blocker]

*Coughs*

 

[SIstudy]

Here you go, NOW I AM OFF, I HAVE TO REVISE
View attachment 42473

how did yu do it like this, I mean why did yu draw the triangle this way :S

 

[Thought blocker]

how did yu do it like this, I mean why did yu draw the triangle this way :S

That's how we draw triangle. How do you draw it?