IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Sciences => Topic started by: godfather93 on May 10, 2009, 08:13:31 pm

Title: physics
Post by: godfather93 on May 10, 2009, 08:13:31 pm
can all of you taking physics tell me how you are studying for the paper 6. what topics are you revising and how are you revising? (for example are you just doing past papers or other things as well). I'm in some mess, and i' trying to get out of it.
Thanks
Title: Re: physics
Post by: X Abdulrahman X on May 10, 2009, 08:18:11 pm
dont worry about physics its really easy u will realise that once u start doing lots of p6's :P
atm im only doing past papers but im focusing all little more on mirrors /rays and circuits cuz some are hard, some of them are also included in p3.
Title: Re: physics
Post by: godfather93 on May 10, 2009, 08:22:06 pm
ok. and what about the others?
Title: Re: physics
Post by: X Abdulrahman X on May 10, 2009, 08:26:15 pm
ok. and what about the others?

u mean other exams or topics ?

well i dont study as much p6's for physics as other exams cuz its not tht hard.

other p6 topics are easy, most of the questions already have an equation and u basically put numbers in them to get an answer, and some questions they tell u to measure X-Y etc using a ruler :P
Title: Re: physics
Post by: godfather93 on May 10, 2009, 08:32:16 pm
do you know if snell's law and the right hand rules are coming in the exam?
Title: Re: physics
Post by: sweetsh on May 10, 2009, 08:33:03 pm
Solving past papers and knowing all the ideas in them are all what we need.
Title: Re: physics
Post by: theigstudent on May 10, 2009, 08:33:35 pm
i m just solving past paps
n till now onli done 2 of them
i m in a real bad position
god help me
best of luck 2 u
Title: Re: physics
Post by: emi on May 10, 2009, 08:37:27 pm
im also doing past papers .. and i see most if u do .. so PLEASEEE  any one did this can u tell me how to solve it ???

m/j 2003 paper 6 physics Q4 part b  .... please im waiting
can any one also do O/N 2003 Q1 part d Huh? please ..Pleeeaaaseeeee i need these
Title: Re: physics
Post by: sweetsh on May 10, 2009, 08:42:02 pm
MJ03 b)i) c=1.2*3.142
=3.77 mm=0.37cm
ii) 90 degree -> 0.37
   360 degree-> x
x= (using cross multplication) 1.48cm
Title: Re: physics
Post by: emi on May 10, 2009, 09:05:57 pm
dono why but answer at MS is 0.94 ?
Title: Re: physics
Post by: sweetsh on May 10, 2009, 09:07:11 pm
?!
I answered this with our tutor today. Going to check
Title: Re: physics
Post by: angelic on May 10, 2009, 09:09:57 pm
MJ03 b)i) c=1.2*3.142
=3.77 mm=0.37cm
ii) 90 degree -> 0.37
   360 degree-> x
x= (using cross multplication) 1.48cm

sweetsh i think ur answer is wrong .. we should devide 3.77mm by 4 which gives us 0.94 mm
Title: Re: physics
Post by: sweetsh on May 10, 2009, 09:13:18 pm
Yes i) is right ii) is wrong. I blame my teacher, sorry.
Title: Re: physics
Post by: emi on May 10, 2009, 09:16:08 pm
its ok ,,,
but how did u know to divide by 4 ???
Title: Re: physics
Post by: godfather93 on May 10, 2009, 09:24:53 pm
you have to divide it by four because it says that the pointer moved through to 90o. And 900 is 1/4 of the pin's circumference.
Title: Re: physics
Post by: emi on May 10, 2009, 10:07:53 pm
ic ... thanks
if any one could do Nov. 2003 Q1 d), that would be great
Title: Re: physics
Post by: astarmathsandphysics on May 10, 2009, 10:13:00 pm
Which paper?
Title: Re: physics
Post by: sweetsh on May 10, 2009, 10:14:20 pm
Astar it is definitely paper 6!
Title: Re: physics
Post by: forkasha on May 10, 2009, 10:22:41 pm
look the volume of the cylinder is = by* r2*r
then volume of m = 1/3 of the volume of the cylinder ..............right
so vm=1/3 by r3(0.6)3=0.5
i wish u have got it if not tell me may be i could explain more
good luck
Title: Re: physics
Post by: emi on May 10, 2009, 10:49:32 pm
i dnt get the formula u used .. and how u knew that m=1/2 ?
could u please explain little more .. i appreciate your help .  thanks alot
Title: Re: physics
Post by: astarmathsandphysics on May 10, 2009, 10:53:55 pm
i dnt get the formula u used .. and how u knew that m=1/2 ?
could u please explain little more .. i appreciate your help .  thanks alot

Use the formula Vm=1/3pi*r3
Title: Re: physics
Post by: godfather93 on May 10, 2009, 10:56:49 pm
how do you know Vm is 1/3*pi*r3
Title: Re: physics
Post by: emi on May 10, 2009, 10:58:23 pm
yeah ,, how can anyone com up with that ??? how did the r turn r3  ??
Title: Re: physics
Post by: astarmathsandphysics on May 10, 2009, 11:01:24 pm
Cut off the bit at the bottom then from the centre of the hemisphere to the edge and the bottom =r so V=pi*r2h=pi*r3 and take away voume of hemisphere=2/3*pi*r3

Subtract to give Vm=1/3*pi*r3
Title: Re: physics
Post by: sweetsh on May 10, 2009, 11:02:01 pm
The forum today caused me a headache!
Title: Re: physics
Post by: godfather93 on May 10, 2009, 11:05:05 pm
how do you know that the volume of the hemisphere is 2/3 of the volume of the sphere
Title: Re: physics
Post by: emi on May 10, 2009, 11:05:55 pm
exam is in one day .. expect anything ;)
Title: Re: physics
Post by: godfather93 on May 10, 2009, 11:06:22 pm
ohhhhhhhhhh.... I get it. My bad, it's a hemisphere.
Thanks, finally i get it! :D
Title: Re: physics
Post by: sweetsh on May 10, 2009, 11:07:02 pm
I know! Im so in a rush and dont know how im studying 3 subjects at a time in addition to the forum!
Title: Re: physics
Post by: emi on May 10, 2009, 11:11:41 pm
why 3 subjects ?  focus on your physics for now .. i can only manage to study 2 subjects .. math at morning and Physics at night .. i cant handle more ..

don't strain your self dear .
Title: Re: physics
Post by: sweetsh on May 10, 2009, 11:12:47 pm
I know sweety im stressing myself for nothing. And its too late now I should go and sleep. And yes im revising my physics notes for paper6.

God be with us!
Inshalah!
Title: Re: physics
Post by: emi on May 10, 2009, 11:21:47 pm
inshallah ,, without god help with us we can do nothing no matter how much we study ;]

good night ... i bet u'll have dreams about the exam ;)