Biology; Chemistry; Physics: Post your doubts here!

[chocolate_girl]

i have done this paper earlier

Heyy i gotttt it, i intersected my lines the value is 0.65 noww thankyou aloott for all that help

 

[asma tareen]

Heyy i gotttt it, i intersected my lines the value is 0.65 noww thankyou aloott for all that help

glad u got it

 

[chocolate_girl]

Will have to trouble u a lil moree could you plz tell me ans of q5-6 with reason that y it is so.

 

[Executor]

AOA,
Please spare few minutes and go to this thread http://www.xtremepapers.com/community/threads/dua-for-all-candidates.14272/ and make dua for all those currently appearing in the exams. You will also find useful duas in it and Remember every share counts.

 

[Hskk]

Are you guys learning the logic gates? We do have a choice to leave them, right?

 

[farhan141]

can someone please provide me notes for all the colors of alkali metal oxides and carbonates such as Na, K, Mg, Al, Na, pb and links to sites that are imp?

http://word.office.live.com/wv/Word...eYYXrmTSrbKr&title=NAMES+OF+IONS+OR+SALTS+(1)

 

[HarithAslam]

Are you guys learning the logic gates? We do have a choice to leave them, right?

yep. theres a choice.
nope not learning them as there's pretty useless info about logic gates around.

 

[farhan141]

Can anyone help me out and give me details or notes about C.R.O and GM Tube.

 

[Hskk]

yep. theres a choice.
nope not learning them as there's pretty useless info about logic gates around.

Great. I'll skip them too.

 

[Amnaa]

Electical Conductivity – Moving Ions
Heat Conductivity – Free Moving electrons
please explain this link..

 

[Suchal Riaz]

Electical Conductivity – Moving Ions
Heat Conductivity – Free Moving electrons
please explain this link..

when any ionic compound is in solid states neither electrons are free not there are any ions which can move away from their place. they are in fixed positions. when molten or in aqueous form the ions can move and transfer charge.
in solids the heat is conducted when molecules/atoms who get heat vibrate more vigorously and transfer energy to their neighbouring particles.
but in metals, in addition to this the free electrons can carry energy more quickly to whole metal and transfer it to ions when they collide. thats why metals are better conductors of heat than non-metals.

 

[Jassim]

Describe the menstrual cycle with reference to hormones fully. (10 marks)
Describe fertilization in a womens body? (8 marks)

 

[HDIWAN]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w03_qp_2.pdf

in question 7 part a the direction of force should be upwards??

 

[asma tareen]

Will have to trouble u a lil moree could you plz tell me ans of q5-6 with reason that y it is so.

for Q5 i think its B cux look its the alkali would be more than more HCl would be required to neutralize which will increase the volume
fr Q6 look we know that in air abt 20% is Oxygen we will calculate the amount of O2 reacted which would be 20/100 * 80 =16
thn subtract it frm 80 so the lef vol wud be 64
ANS IS C
sorry fr late reply

 

[usama321]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_w03_qp_2.pdf

in question 7 part a the direction of force should be upwards??

yup it should be upwards. i checked with a couple of other guys and we think there is an error in the mark scheme

 

[HDIWAN]

u

yup it should be upwards. i checked with a couple of other guys and we think there is an error in the mark scheme

uffffff...

 

[usama321]

Is anyone sure about preparation of Physics ATP? It can be sometimes quite unpredictable, and i am worried about it

 

[HarithAslam]

could anyone plz post the link to the best Bio ATP notes here?
thank you

 

[chocolate_girl]

for Q5 i think its B cux look its the alkali would be more than more HCl would be required to neutralize which will increase the volume
fr Q6 look we know that in air abt 20% is Oxygen we will calculate the amount of O2 reacted which would be 20/100 * 80 =16
thn subtract it frm 80 so the lef vol wud be 64
ANS IS C
sorry fr late reply

Thankyou once again n its not a problem at all

 

[asma tareen]

Thankyou once again n its not a problem at all

u're welcome and u dont need to thank me everytime sis