Physics, Chemistry and Biology: Post your doubts here!

[Dtrickster]

Guys how was physics.... I almost cried when I saw how hard it was

 

[studyingrobot457]

Guys how was physics.... I almost cried when I saw how hard it was

which variant, I did p21 and p41, p21 was easy, p41 a bit tough, and had less time

 

[Dtrickster]

Adeen Atif does this question looks familiar to you? :'D

I think I did variant 1 .... How did u find that emf and what was the total resistance

 

[Adeen Atif]

Adeen Atif does this question looks familiar to you? :'D

omg I remember! we had a huge discussion over it and in the end it was concluded that...I did it completely wrong . ahh man I dont even understand it now

 

[Ayesha Asif333]

omg I remember! we had a huge discussion over it and in the end it was concluded that...I did it completely wrong . ahh man I dont even understand it now

Not to mention our moods that day

 

[Adeen Atif]

Not to mention our moods that day

bwaha yeah

 

[Moddy Study]

I need help real quick.. ..

it's 0625_s10_qp_32 question number 9 section b (i)
why is the resistance 2 ohm but not 6/11??
shouldn't the circuit be a parallel ? please hellllp

 

[Moddy Study]

I need help real quick.. ..

it's 0625_s10_qp_32 question number 9 section b (i)
why is the resistance 2 ohm but not 6/11??
shouldn't the circuit be a parallel ? please hellllp

 

[Hamnah Zahoor]

I need help real quick.. ..

it's 0625_s10_qp_32 question number 9 section b (i)
why is the resistance 2 ohm but not 6/11??
shouldn't the circuit be a parallel ? please hellllp

I am guessing I am late but still...


And current favours the path where there is low resistance.

 

[Moddy Study]

Thank You
but ...
doesn't the current split when there's a junction?

 

[Hamnah Zahoor]

Thank You
but ...
doesn't the current split when there's a junction?

Yes the current do split up when there is a junction but at points when on one of the paths the resistance is zero the current favours that path only.

 

[PhysicsDoc]

Physics Problem...
A uniform metal tube of length 5m and mass 9kg is suspended horizontally by two vertical wires attached at 50 cm and 150 cm respectively from the ends of the tube. Find the tension in each wire.
Hope you can help ^-^

Call the tensions in the two wires A and B newtons respectively. Take moments about one of the points where the wire is attached to the beam. If this is where the A force acts, then its moment will be zero and you can apply the principle of moments to find B. Once you have B you can simply use the fact that the total upward force is equal to the total downward force. In this case A + B = 9g newtons. Job done.

 

[Dalia Omar]

Can anyone give me source where I can find sample and model answers to Planning Questions (last Question) to paper 6 (IGCSE) . I found a very useful video in this link below.

Can anyone suggest anything more.

 

[Moddy Study]

Can anyone please help me by posting an answer for 0625_w12_qp_32 question 2 (b) Vector Diagram ??

 

[HLOMPHO PRINCESS]

I need help with something in physics I hope I can still post my doubt can someone please explain sensitivity,range,speed of response and linearity what affects them in the LIG thermometer

 

[Moddy Study]

I have a question. PLEASE HELP. TOMORROW IS MY EXAM. Why is the answer C ?

 

[HLOMPHO PRINCESS]

I have a question. PLEASE HELP. TOMORROW IS MY EXAM. Why is the answer C ?

omw i bet this is so late but i just saw this idk if it will help for some reason the workdone=(f*d)+k.e which means f*d + 1/2mv^2 which is 10000+2500..so crazy

 

[ssxxss]

You can also ask in the A level forum btw.
Here you go...
AS-P2 topicals for Biology here and here.
P4 topicals for Biology here and here.

Other Biology A level things:
AS Biology
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-260#post-913723
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-260#post-913737
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-260#post-913752
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-260#post-913784
^ AS paper 1 Notes by My Name read full posts and note down the mistakes!
https://www.xtremepapers.com/commun...ry-and-biology-revision-guides-updated.40762/
^Revsion guide :
https://www.xtremepapers.com/commun...o-phy-chem-maths-with-markschemes-here.36384/
^AS classified past paper 2
https://www.xtremepapers.com/community/threads/biology-practical-notes.4718/
^ AS paper 3

https://www.xtremepapers.com/community/threads/biology-9700-paper-4-past-paper-notes.41234/
https://www.xtremepapers.com/community/threads/biology-p4-section-b-solved-2002-2013.33080/
^A2 paper 4 solved and notes

https://www.xtremepapers.com/community/threads/biology-paper-5-tips.27105/
^A2 paper 5 tips

I hope that helps.

the link doesnt work

 

[kiran kk]

Hello! I am having problems in the Unit of Electromagnetism in Physics, I have doubts in b), bii), biii) and biv)
I have done A and C, can anyone help me
Can anyone mention the answers?

 

[Mr.Physics]

Hello! I am having problems in the Unit of Electromagnetism in Physics, I have doubts in b), bii), biii) and biv)
I have done A and C, can anyone help me
Can anyone mention the answers?View attachment 65039

if XY is moved horizontally in any direction, no magnetic field lines will be cut therefore no change would be observed on the pointer.
However, if XY is moved up and down repeatedly at right angles to the magnetic field, the magnetic field lines are cut and current is produced because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move. So the answers will be:

(i) no change
(ii) no change
(iii) no change
(iv) pointer flickers between A and B