Biology; Chemistry; Physics: Post your doubts here!

[daredevil]

Q2 a (ii) Height Difference = ?

Please show all the working and formulae as i don't know how to do it

the height will be calculated using the gravitational potential energy formula:
G.P.E=m*g*h
5.5*10^4=850*h
h= 5.5*10^4 / 850
= 64.7m

 

[Talhakhan]

Tayyari bilkul bhi nai hai ( And i am really weak in theory .. MCQ mein tu aajayeingay Insha Allah 38-39/40 Theory ka Masla hai

No problem same here MCQ ki tiyari bohat achi hai annndddddd theory upar sa ja rahi hai

 

[Talhakhan]

*Allah

Sorry my mistake (ALLAH)... Edited it

 

[Dukeofwin]

Maybe Allah made exams because Allah wanted His people to remember him more than anything else when they(Exam) are near!
Well everyone Best Of Luck! Hope exam comes as you have prepared!
Cant believe XPF has more addiction power than Twitter does during exams!
Anyways, Dont stop praying ALLAH that you never go to Him except during exams instead think it as a Way to go to Him.
Stay Blessed! Be Prepared! And Dont let your stress take over you!

Over and Out....

 

[Talhakhan]

Maybe Allah made exams because Allah wanted His people to remember him more than anything else when they(Exam) are near!
Well everyone Best Of Luck! Hope exam comes as you have prepared!
Cant believe XPF has more addiction power than Twitter does during exams!
Anyways, Dont stop praying ALLAH that you never go to Him except during exams instead think it as a Way to go to Him.
Stay Blessed! Be Prepared! And Dont let your stress take over you!

Damn you are right... I think in near future exams ,#XPF would be the trending topic whole month... Lol

 

[paradoX error]

W_ 10/ qp_22/ Q_9_a_(i and ii) ???

 

[ashiqbal]

which are the most difficult topics in the book ... Just tell so that i can revise/prepare them....

it differs according to your preparation, go through topics which you have never even read!

 

[ashiqbal]

okay over and out!

 

[syed1995]

it differs according to your preparation, go through topics which you have never even read!

that's probably half the topics !! lol.

 

[malay]

in case someones there plz explain Q/30
http://www.xtremepapers.com/papers/...nal O Level/Physics (5054)/5054_s10_qp_12.pdf
how come the ans is B?

 

[syed1995]

in case someones there plz explain Q/30
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s10_qp_12.pdf
how come the ans is B?

Pretty simple .. using the principle of moment ..

15*(30+30)=900 To find the moment

to find weight .. Moment=Weight*30
as moment equals 900 Divide the answer (900)/30 to get weight.

then DIVIDE weight by 10 to get the answer. <-- This is what i forgot to do.

that answers your question pal?

 

[paradoX error]

w 10
qp 22
Q 10 iii)

:O

 

[beeloooo]

can any 1 briefly explain the fuctioning of the ripple tank :??

 

[syed1995]

http://www.xtremepapers.com/papers/...nal O Level/Physics (5054)/5054_s11_qp_21.pdf

Q10.) (b) (iv)

 

[snoonono]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s11_qp_21.pdf

Q10.) (b) (iv)

u need to use R=V/I and change I to amperes 1st by dividing by 100

 

[malay]

that answers your question pal?

dats a different question buddy

 

[beeloooo]

http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s11_qp_21.pdf

Q10.) (b) (iv)

AS I = P / V !! 1000 / 240 = 4.1667 A !! as the fuse rating should be higher than the current so it will be 13 hope it helps !!

 

[syed1995]

AS I = P / V !! 1000 / 240 = 4.1667 A !! as the fuse rating should be higher than the current so it will be 13 hope it helps !!

You answered Q9 b iv .. lol

 

[syed1995]

u need to use R=V/I and change I to amperes 1st by dividing by 100

that doesn't give the correct answer .. and it will be divide by 1000 not 100! as milli = 1000th.

 

[syed1995]

in case someones there plz explain Q/30
http://www.xtremepapers.com/papers/CIE/Cambridge International O Level/Physics (5054)/5054_s10_qp_12.pdf
how come the ans is B?

my bad yours is even easier !

B part.

Current is in mA .. so divide it by 1000.. V=IR keep multiplying so V=(mA/1000)*100 .. the one which gives correct values is the right one.