Physics: Post your doubts here!

[kitkat <3 :P]

From now i am available for answering any physics questions. My revision is almost complete except w13 paper. Thought blocker

waaahhhhh m starting now

 

[Thought blocker]

From now i am available for answering any physics questions. My revision is almost complete except w13 paper. Thought blocker

Great, I am going to sleep I am bored of Computing.

 

[JAVERIA INAM DANISH]

Yeah simultaneously but can you work out the answer?

 

[kitkat <3 :P]

\

Yeah simultaneously but can you work out the answer?

sure

 

[DeViL gURl B)]

Guys is this the perfect definition ?
BROWNIAN MOTION : It is defines as the random motion caused by the smoke particles colliding with the fast moving air molecules.
Where do we include the spec of light? :$

Anyone please?

 

[princeali97]

Why is the brightness of images increases as the order number increases?

Brightness of fringes increases? I think it decreases my friend.Pls check .
Reason-Distance traveled by the wave increases as order number increases.

 

[Haya Ahmed]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_23.pdf

Q1 e (i),(ii) should we convert the speed into forces ? please someone explain ! .. thanks

Suchal Riaz

 

[Haya Ahmed]

Anyone please?

try using the word random zig zag motion

 

[Suchal Riaz]

Snow Angel
question number 4 (b) (iv)
current = 0.24 A
(a) p.d = IR = 0.24*5.5=1.32V
(b) terminal p.d = emf - lost volts = 4.4 V - (0.24 A * 2.3 ohm) = 0.552 V
(c) terminal p.d = emf - lost volts = 2.1 V - (1.8 ohm * 0.24 A) = 1.67 V

 

[_Ahmad]

Yeah simultaneously but can you work out the answer?

two equations are :
200=6u+18a
400=10u+50a

solve them simultaneously
a=3.33 ms^-2
u=23.33 ms^-1

 

[princeali97]

Anyone please?

Specs of light are observed when the smoke particles collide with the air particles yeah.Brownian motion is described by the random,haphazard motion of smoke particles as they collide with air particles causing specks of light to be seen.

 

[forever_chocoholic]

From now i am available for answering any physics questions. My revision is almost complete except w13 paper. Thought blocker

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w13_ms_23.pdf
can anyone help me with question 5 c? pleaseeeeeeeeeeee

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w02_qp_2.pdf
AND can someone explain how to solve question 5 (b) please !!!!

 

[Suchal Riaz]

Anyone please?

actually we write specks of light because the particles themselves are not visible. we can't figure out their shape or anything but only small specks of light so we know their location only.

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w13_ms_23.pdf
can anyone help me with question 5 c? pleaseeeeeeeeeeee

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w02_qp_2.pdf
AND can someone explain how to solve question 5 (b) please !!!!

in the post you qouted i said i haven't done winter 13 papers. i will answer your question when i have myself done that paper. and for now i am solving other queries before resuming my practice. so please wait about an hour.

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_23.pdf

Q1 e(ii) should we convert the speed into forces ? please someone explain ! .. thanks

we are required to find resultant velocity(not force) which is found be adding velocities, like we add other vectors, through triangle rule, head-to-tail rule or parallelogram rule. head to tail is easiest.
you write a scale like 20cm = 1m/s so the diagram fits into the given space. do you want me to draw it for you?

 

[Haya Ahmed]

we are required to find resultant velocity(not force) which is found be adding velocities, like we add other vectors, through triangle rule, head-to-tail rule or parallelogram rule. head to tail is easiest.
you write a scale like 20cm = 1m/s so the diagram fits into the given space. do you want me to draw it for you?

Yeah It will be more helpful If you drew it ! and add e (i) to it too cuz I'm not sure It is right or not .. thanks a lot !

 

[princeali97]

Heres my question.Is my answer correct? Just want to make sure.

 

[kitkat <3 :P]

An aircraft travels the first 200m in 6 seconds and the next 200m in 4 seconds. Calculate the initial velocity and the acceleration of aircraft.
Please help!!
Does anyone know its answer?

m getting weird answers
Suchal Riaz

 

[DeViL gURl B)]

Guys can some PLEASE gimme a detail bots in the internal energy .. I always get confused ..
Like what I want is what happens to the K.E and the P.E .. As the change in state takes place.. Like from solid to liquid as well as liquid to gas.. DETAILED
Thank u
Please help

 

[_Ahmad]

can anyone please explain Q4 c ii) 2. from
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w09_qp_22.pdf