Physics, Chemistry and Biology: Post your doubts here!

[Dubi Pro]

Which paper is this?

i really dont knw, my sir has compiled all of the hardest CIE questions from oldest to new. so no clue.

 

[Phoenix Blood]

Arthropods have jointed legs.
What does jointed legs mean?

 

[Phoenix Blood]

A solution means a liquid dissolved in water or in any solvent?

 

[Usama Shahab]

I feel difficulty in solving paper6 can u suggest anything
thanks

 

[Usama Shahab]

These are 2013 MayJune Physics
All Variants
Paper 1
3 and 6
Enjoy Guyzzzzzzzzzzzzzzzzzzzzz!!!!!!!!!
suggest any thing which can help me to solve paper6
Any Suggested Notes!!!

 

[vevoxDho]

for which subs?

http://www.mediafire.com/folder/iuxtawn7rrkdh/Cambridge_IGCSE#mctlb4gi2ws6

 

[princess sofia]

I am having problem with magnetism, forces and moments. Can anyone give me any advice on how to study these topics or any useful resources related to these topics. Thank You!

watch lectures related to thm on youtube they help alot

 

[Allah's Slave]

I'll give IGCSE English as a Second language (Extended) 0510, in the coming session May/June 2014. So I'll take paper 2 and 4 which are extended but I'm having trouble in deciding wether to take Paper 5 Oral or Paper 6 Oral Coursework. And Is paper 5 a part of the extended syllabus and has grades starting from A* like every Extended version? So Basically can I take paper 5 if em takin paper 2 and 4 ?

And are Scientific Calculators allowed in the examination hall for IGCSE Physics 5054? Because simple calculators don't have the appropriate functions that are needed for the exam.

 

[lol_lmao_lmfao]

here is a formulas sheet paper and explanations for phy igcse

 

[neumonia]

Accomodation in terms of the eye is how your eye accomodates itself when there is an external change.
For eg, while in a sunlit garden, lots of light will enter your eye and can spoil it's funtioning. So the pupil of the eye becomes small so that less light enters. Radial muscles relax. Circular muscles contract. R=R. C=C. All in bright light.
The complete opposite happens in dim light.

Thank you Phoenix Blood.

 

[Lola_sweet]

I'll give IGCSE English as a Second language (Extended) 0510, in the coming session May/June 2014. So I'll take paper 2 and 4 which are extended but I'm having trouble in deciding wether to take Paper 5 Oral or Paper 6 Oral Coursework. And Is paper 5 a part of the extended syllabus and has grades starting from A* like every Extended version? So Basically can I take paper 5 if em takin paper 2 and 4 ?

And are Scientific Calculators allowed in the examination hall for IGCSE Physics 5054? Because simple calculators don't have the appropriate functions that are needed for the exam.

I'm doing English as a Second language the extended in the May/June 2014 session and i'm also taking Paper 2 and Paper 4 with that i'm also doing the Paper 5 Oral Paper. So yes you can take Paper 5 with Paper 2 and Paper 4. However paper 5 is marked on the basis of 1 to 10 with 1 being the highest mark and 10 being the lowest. So when you get your results for english you will have your grades written and in a bracket next to it you will have your speaking grade.

About the calculators i'm pretty sure you can take scientific calculators. By the way are you taking IGCSE Physics 0625 or O-Level Physics 5054. Because in IGCSE you are allowed calculators.

 

[princess sofia]

hey guys i need bio n phys study guide urgently
where would i find it , i cnt find it any where on internet plz help !!

 

[vevoxDho]

http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s12_qp_33.pdf
Q9 b? Can anyone please explain?

Firstly, treat every measurement as if the current is 0.9A.
Then, get the rsistance of 1 lamp at this current, which is "8 Ω * 105% = 8.4 Ω".
Then, get the total resistance of circuit at this current, which is "240 V / 0.9A = 266.67 Ω". This is the maximum resistance of the total circuit that would make the lamps glow.
Therefore, to get the maximum number of lamps that could be present at this current before fuse blows, we use "266.67 Ω / 8.4Ω ≈ 31.7 lamps",
and so, the maximum number of lamps that could fail before fuse blows is"40 - 31.7 = 8.3 lamps = 8 lamps (to an integer)".
So, number of lamps = .......................8.........................

Note: 1 - If 8 lamps failed, fuse wouldn't blow. This is because resistance of the total circuit would be "8.4 Ω * 32 = 268.8 Ω", which is greater than 266.67 Ω and so, a current of less than 0.9 A would flow.
If 9 or more lamps failed, fuse would blow. This is because resistance of the total circuit would be "8.4 Ω * 31 = 260.4 Ω" in case of 9 lamps failing, which is less than 266.67 Ω and so, a current of more than 0.9 A would flow. If more lamps failed, resistance would decrease further and current woluld increase further.

2 - A "fail-short" lamp means that if one lamp fails, current would still flow, but the resistance of the lamp would change to approximately 0 Ω, as if the lamp changed into a wire. This reduces the total resistance of the circuit. If a normal lamp fails in a series circuit, current would stop flowing. But, if a "fail-short" lamp failed in a series circuit, current would still flow. These "fail-short" lamps reduce the need for parallel circuit connections.

 

[vevoxDho]

Hey, did the enterprise paper of 2013 winter come out anybody. If it did and u see it, please can you give it to me. I really need it. Thanks in advance.

O/N 2013 physics past papers.
http://ciestudy.blogspot.com/2014/02/download-igcse-physics-0625-october.html

 

[vevoxDho]

I can' t understand question 3 (c) in O/N 2010 paper 61. Could anybody explain it?

 

[Awesome12]

I can' t understand question 3 (c) in O/N 2010 paper 61. Could anybody explain it?

0.5 Io = 0.5*(3.0)
=0.15

The resistance value from the table shows that a 10.1 value for R makes 0.15 A of current flow in the circuit
Let the resistance of X be x
Total resistance in circuit = 10.1 + x = 2x

solve for x
10.1 + x = 2x
x = 10

 

[Lola_sweet]

The IGCSE Syllabus for physics 0625 have asked to "Recall and use the simple electron model to distinguish between conductors and insulators"
can anyone send me a link of what we must study here?
Thank You!

 

[Allah's Slave]

I'm doing English as a Second language the extended in the May/June 2014 session and i'm also taking Paper 2 and Paper 4 with that i'm also doing the Paper 5 Oral Paper. So yes you can take Paper 5 with Paper 2 and Paper 4. However paper 5 is marked on the basis of 1 to 10 with 1 being the highest mark and 10 being the lowest. So when you get your results for english you will have your grades written and in a bracket next to it you will have your speaking grade.

About the calculators i'm pretty sure you can take scientific calculators. By the way are you taking IGCSE Physics 0625 or O-Level Physics 5054. Because in IGCSE you are allowed calculators.

Thnx alot ! Em taking IGCSE Phy. 0625. Are you a school candidate?

 

[Allah's Slave]

Has anyone got the IGCSE ESL oral dates?

 

[princess sofia]

Has anyone got the IGCSE ESL oral dates?

yeah ,in buraidah we r gvn 13 april