Biology; Chemistry; Physics: Post your doubts here!

[kitecrystal]

anyone plz explain Q11(b)(ii),(c) of june 2003 paper2 5054 physics....

 

[convent2012]

november 2003 paper2 q6 of 5054 physics????

b) the needle would vibrate from West to East because of the changing magnetic field of the current in the wire and the compass wil not response quickly !

 

[ashiqbal]

thanks for reposting my notes spidey!

 

[ashiqbal]

how is the calcium carbonate used to reduce the effect of acid rain?
and how is it used in flue gas desulfurisation?

there were only two points given in ms for a two mark question which came. the points were :
1. used in flue gas desulfurisation/removal of sulfur from fossil fuel smoke
2. added in lakes to reduce acidity

i myself was very confused but this was the answer in ms

 

[ashiqbal]

yes its not included! nd i checked that all these electronic topics(logic gates, bistable astable and transistors) rarely cum nd even if they do then its always in EITHER and Or question!

these topics are an optional part of our syllabus

 

[SalmanPakRocks]

Flue gas desulfurisation is the process in which Sulfur dioxide is removed from the Chimney of Factories. It is done my reacting it with CaCO3

 

[SalmanPakRocks]

these topics are an optional part of our syllabus

Yes but it's better to prepare the to face trouble

 

[ashiqbal]

found some questions

related to transitors... hope these help =)

can u please give the answers of this question paper? and can u please tell that is this only a practice paper or are these questions from recent past papers?

 

[Rimsa]

can u please give the answers of this question paper? and can u please tell that is this only a practice paper or are these questions from recent past papers?

umm sorry but i just downloaded them from around here. i dunt have the answer key. so sorry again =l

 

[ashiqbal]

umm sorry but i just downloaded them from around here. i dunt have the answer key. so sorry again =l

ok. well if anyone solves it, please tell me

 

[SulmanAli]

Q. What is the test for Substrate ?

 

[Vogue]

Q. What is the test for Substrate ?

is it o level bio nd did u find this one in any past paper?

 

[kitecrystal]

november 2003 paper2 q6 of 5054 physics??

 

[khizer shahab]

november 2003 paper2 q6 of 5054 physics??

in 1st part simply connect three bulbs in parallel
b) use the formula P=VI now therefore 30/240 = 0.125 A
c) now just multiply by three to get current of three bulbs => 3(0.125) => 0.38 A

 

[Tharindu]

Only two weeks for exams....anyone has any idea how to revise for physics and chemistry thoroughly...but I want to spend min time possible....

 

[Spidey21]

thanks for reposting my notes spidey!

its just to shae isnt it??

 

[mintchocolate4567]

What is the effect of adrenaline on:
1)the rate of peristalsis,
2)rate of digestion?

 

[ashiqbal]

What is the effect of adrenaline on:
1)the rate of peristalsis,
2)rate of digestion?

rate of peristalsis slows down, all other thinga speed up, and pupil dilate

 

[Tharindu]

Does anybody know a site or notes on the experiment of the lenses used to form objects...coz this is where I get stuck in paper 4..pls help

 

[Tharindu]

Is paper 1,2,4 physics taken from only the syllabus..do they ever ask anything out of the syllabus....is it the same for experiments in the syllabus...like describe experiment for total internal reflection....do they ask experiments which is not in the syllabus