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[holtadit]

2007 winter paper 6

Question 1 c  i


Please explain the answer - MS is useless

[haris94]

yes, answer does support the theory

at the start, the temperature of the water is 68
suppose room temperature is 25
the difference is 43

now in the final minute, the temperature of the water is 29
the difference in temp between the water and room temperature is now only 5

your answers of t1 and t2 in b part prove the above

so the theory "rate of cooling of the hot water at any time depends on the difference between the temperature of the water at that time and room temperature" is right according to the answer

[SEL123]

So you know that room temperature is about 27 C right?
At 0 seconds, the temperature is 68, then at 20 its 53
There's a temperature difference of 15 degrees
68 degrees is very far from the room temperature, so the change in the next 30 seconds is very large

But as the temperature gets closer to room temperature, the change is less.Eg:

At 270 seconds, the temperature was 28.5
At 300, its at 28
The increase is only 0.5

[holtadit]

yes, answer does support the theory

at the start, the temperature of the water is 68
suppose room temperature is 25
the difference is 43

now in the final minute, the temperature of the water is 29
the difference in temp between the water and room temperature is now only 5

your answers of t1 and t2 in b part prove the above
so theory is right according to the answer

So the greater the difference between room temp. and the temp. of the water the GREATER THE RATE OF COOLING ?

[thenewkid™]

Alright I'm trying it now..


Can you re-explain that?
I didn't reallly get it...

hope this is correct

[IG4ever]

yes

[haris94]

So the greater the difference between room temp. and the temp. of the water the GREATER THE RATE OF COOLING ?

exactly

thats what the theory says in the question
we just hv to prove it

[SEL123]

Oh, thanks

I'm taking the Paper 6 exam tomorrow

I saw the october november 09 one
It was beyond easy

Does anyone think ours would be easier too??

[The Golden Girl =D]

Alright
So T/s starts from 1.0
Each 5 squares = .1
So it goes:
1.0    1.1.   1.2 alll the way up till 2

for l/cm
You can start from 40
each square is = to 1
thats the only way you can do it

1.0    1.1.   1.2 alll the way up till 2   do i start it with one or 0 ?


umm okay here a somewhat drawin that inshAllah might be useful
     l l         this is a baterry k
----1----     this is lamp 1
----2----        this is lamp 2
----3----        this is the voltmeter

got it ?

By the way i kno that i didn't draw coppper wires that complete the circuit .....but if u want the drawing to be complete u chould connect the gaps i had with copper wires ,k?

[thenewkid™]

i really hope so i have it 2morrow as well

[haris94]

can anyone pls tell me how to draw the circuit in question 2 a

this is from winter 08 p6

[The Golden Girl =D]

i really hope so i have it 2morrow as well

just so u kno everyone around the world is gonna have it tomorrow too ......... an evidence of this , is that my friend livin in oman has physics paper 6 tomorrow at the same timin , u see  

[haris94]

just so u kno everyone around the world is gonna have it tomorrow too ......... an evidence of this , is that my friend livin in oman has physics paper 6 tomorrow at the same timin , u see  

agreed
physics p6 is tomorrow for all igcse students around the the world
though not always same timing

[thenewkid™]

then wats the fuss abt variant 1 and variant 2?

[The Golden Girl =D]

then wats the fuss abt variant 1 and variant 2?

my friends who r egyptians always have pastpapers with varient one cuz in egypt they take varient 1 which is soo similar to varient 2 but maybe 2-3 questions r different , u see ........... but as for where i live everyone does varient 2 .....so i guess there isn't much of a fuss here...