Maths & Physics Help

[sweetsh]

Astar I just want to check if "Charles' Law" is included in the IGCSE syllabus

[astarmathsandphysics]

I am sure it is because someone posted a question on it.

[cockyxrocker]

my friend has some notes 4 these topics .. i'll try to get them for u asap.. dont worry

thanks for helpin '
though i need them asap

[twilight]

ohhhh... my scanner's not working 
but i swear i am trying

[sweetsh]

I hate electromagnetic induction and everything related to magentism

[SGVaibhav]

need help
this paper
may june 05 paper 4 igcse
http://www.freeexampapers.com/FreeExamPapers.com_.php?__lo=SUdDU0UvTWF0aHMvQ0lFLzIwMDUgSnVuLzA1ODBfczA1X3FwXzQucGRm

Questions
7)a)i     (plz try it out)     answer is 46.5
8)a)         (2 answers====>1 and 3     {HOW?})

plz

[sweetsh]

ok 7) a) 50/100 *150 =75
you go to 75 on the cumulative column and you draw a line to see how much is the speed.

8)a) f(x) = x² – 4x + 3
       y=x² -4x + 3
       y= (x-3) (x-1)
       x=3 or x=1

[SGVaibhav]

ok

i got same thing for 7a)
but when i did that thing on graph, my answer is completely different.
try it out in ur pc only without printing
that is :@
it is (46.5 in markscheme) how the f***?

in 8a
i understood
but i had one quesiton

when do the thing we did below and when do we actually substitute?
i am little confused with that.

[sweetsh]

I did it both on pc and on mypaper it was 46.5..make sure you got the point (75) as the scale for the y axis is that 2units for each line so 75 will be between 74 and 76...in addition to the scale on x axis where each line is 0.5 so when you put the line its 46.5

[astarmathsandphysics]

Thanks Sweetsh. I was teaching maths for a few hours.

[sweetsh]

No problem. I was practicing too

[SGVaibhav]

ok let me download another paper.
i think mine is faulty
lol

can u explain me the 8th one
{MINE QUOTE}
in 8a
i understood
but i had one quesiton

when do the thing we did below and when do we actually substitute?
i am little confused with that.


ok the answer is coming right now!
thanx for that one

[sweetsh]

Sorry but I didnt get your question?

[SGVaibhav]

ok 7) a) 50/100 *150 =75
you go to 75 on the cumulative column and you draw a line to see how much is the speed.

8)a) f(x) = x² – 4x + 3
       y=x² -4x + 3
       y= (x-3) (x-1)
       x=3 or x=1

ugh

i cant explain it
i understood.
i cant express my question, but i know the right thing now

it is very hard to explain over here.
i rubbed the whole thing 5 times and wrote it again.


THANK YOU FOR HELP
 

[SGVaibhav]

this is for igcse students

in maths
while doing a question, how much DP or SF do we use?
and we write our answers to how much SF or DP?
because this has been ruining my accuracy.