drop any Doubts in IGCSE Physics, Chemistry and Biology Here

[bilalmalik1997]

welll....i m taking thezz subjects.......at school nd they've planned to study sciences for 2 yearzzzz....so....???

luckyy

 

[champ-student]

luckyy

i DONT really think so....coz i've to carry burden of school examzzz.....nd fear of CIE BOTH!!!!!

 

[champ-student]

hey guys.... i am having a problem in igcse chemistry paper 3 of june 2003 .....can anybody solve question 2 part c? any help would be appreciated .....

HEY b-boy i got a SOLVED paper in which u need need....check this out

 

[b-boy]

thanks.....

 

[Igcse stuff]

does anyone have notes on metals reacting with water?

 

[Era]

i have got some doubts in physics! i hope someone would help me out!
i asked my teacher that why do we NEED ac current in transformers! She said AC is must because current in ac changes direction so thus it will change the magnetic fiield! but my question is that WHY do we need to change the magnetic field?
and why the coil should be insulated?