Biology; Chemistry; Physics: Post your doubts here!

[multixamza01]

Simple print it and then do it.

Easier said then done. How is someone supposed to print it with a netbook?

 

[Birdie Honey]

though the option isnt there, they are happening =P

yeah!!this tragedy happens to every o'level student

 

[Birdie Honey]

5090 is the code.

And dont worry if there are two papers by the same code , these are variants , according to different zones . Do them all , they're all from the same syllabus .

thankyou!

 

[scouserlfc]

Simple print it and then do it.

hey do u remember how when u printed the Maths Paper the Loci question was not to the scale so the case is same the scale is always reduced when its copied for publishing so the correct answer we will never get here

 

[Ali_00921]

Physics..
What's use of bore and a bulb?

 

[ashiqbal]

Physics..
What's use of bore and a bulb?

they both are used to manage the range, sensitivity and reponsiveness of the thermometer as follows:
- the wider the bore, the lower the sensitivity
- the larger the bulb, the lower the response and higher the sesitivity
- the longer the bore, the longer the range of thermometer

 

[ashiqbal]

guys i am confusred a bit as to how to exactly start final preparations for o level exams. i have to give seven subjects this year, comp, bio, chem, physcs, add mths, mths, and english, and i am still not sure how to start the final preparations. by the way, alhamdulillah, i got three A*s last year, all thnks to scouserflc and salmanpakrocks! and i hope to get a similar result this year as well!
i will be grateful if all of you can mention a method for preparation i could use, including the method u use yourself
thanks in advance!

 

[ashiqbal]

my first mocks have finished and i will get the result on 2nd april, 2nd mocks will start from 6 april.
If there is a very difficult question in your mocks, can u please post it here? i will try to post mine as soon as i get them!

 

[ashiqbal]

i have ppt presentations for almost all topics of physics and chem. if u guys want, i will upload them on mediafire.

 

[Tharindu]

i have ppt presentations for almost all topics of physics and chem. if u guys want, i will upload them on mediafire.

Please I need...please post it for physics and chemistry DDDDD

 

[ashiqbal]

ok well, uploadi

Please I need...please post it for physics and chemistry DDDDD

ok well uploding them at the moment. will post link as soon as i do!

 

[Tharindu]

ok well, uploadi
ok well uploding them at the moment. will post link as soon as i do!

Ok thanks

 

[Tharindu]

How do you obtain a metal in between carbon and hydrogen in the reactivity....can somebody explain...I know the top ones electrolysis...bottom occur naturally...but I don't understand between

 

[batool]

they are extracted by reduction with carbon.

 

[ashiqbal]

How do you obtain a metal in between carbon and hydrogen in the reactivity....can somebody explain...I know the top ones electrolysis...bottom occur naturally...but I don't understand between

u mean from metal oxide right?
u can heat with carbon to redeuce metal oxides from zinc to copper. u can also get i by heating with hydrogen except for zinc oxide.

 

[ashiqbal]

http://www.mediafire.com/download.php?s22a77xhlcb0hnm

download physics and chem presentations from here

 

[Vogue]

how do we draw structure of butanoic acid, showing all atoms and bonds ?

 

[batool]

the molecular formula of butanoic acid is C3H6COOH , so draw the structure according to the formula.

 

[Vogue]

the molecular formula of butanoic acid is C3H6COOH , so draw the structure according to the formula.

i know this formula but doesn't structure mean dat dot and cross diagram showing all atoms and number of sharing electrons?

 

[batool]

i know this formula but doesn't structure mean dat dot and cross diagram showing all atoms and number of sharing electrons?

there are two types of structures the dot and cross one and the other is the one showing all the bonds between carbon, hydrogen and oxygen.