CAn we Discuss P4 now????

[utsav156]

hey guys cant we still discuss paper4????

 

[WellWIshER]

yes we can!!

 

[zahraahmed]

I need help asap for question 2(e) in June 07 Chem p5, I have already drawn the graph however I just dont know how to find 'x' ...

http://www.xtremepapers.me/CIE/Internat ... 7_qp_5.pdf

 

[utsav156]

heyhow did ya find out the no of mole of ideal gas????

 

[intel1993]

find the moles indivisulaly for both containers and then add them,.......

 

[utsav156]

find the moles indivisulaly for both containers and then add them,.......

i did the same way!
what was your answer??

 

[AayushR]

How did u find the momentum of the electron that was accelerated through 850V?

 

[marwa355]

yo if someone have a good memory can you plzzz tell the question that came and if u can include the sections with it if anyone with such good memory plz do soo we wana check how much exactly we lost!

 

[abrraza]

paper ws easy..but i cudnt make mst of it..

 

[beacon_of_light]

How did u find the momentum of the electron that was accelerated through 850V?

1/2 mv^2 = qV

find velocity and then use p = mv to find momentum !

 

[abrraza]

How did u find the momentum of the electron that was accelerated through 850V?

by using K.E=eV ... from this we got velocity.. them Momentum=mv

 

[utsav156]

How did u find the momentum of the electron that was accelerated through 850V?

by using K.E=eV ... from this we got velocity.. them Momentum=mv

YA THIS is the method i applied too!!
but m not sure the answer i got might be calculation error

 

[onerepublican]

well...the paper wasnt that difficult as i expected it to be...many found the op amp qs to be difficult but it wasnt in fact difficult ..u just needed to find the pd share in the resistor that was connected to v2...
does anyone remember that were the resistances of the resistor and metal strain gauge in ohms or kilo ohms?

 

[skyfox]

the one in the metal strain is in ohm. 125 ohm and the one in restor in kohm which is 1 kohm. ^_^. The answer for that ques is 4V and -0.13V

 

[hafsahnaim]

I got 4V and -0.12V! I hope that's okay though.. :S

And how do we know to how many significant figures our answers should be (unless specified in the question)? :S
They don't really penalize us for that, do they?

 

[pradeep]

well i changed 1/2 mv^2 to 1/(2m)* p^2 and thus calculated directly equation wid qV.

 

[workinghard]

arggghhh ...
i got da smae ans 4 op amp!!!
fingers crossed dat u r sooooooooooooooooooooooooo rite!!!!!
hated da diffraction ques
no one in ma scol tld me about it.... takin bout tchr
n didnt find it in pacific !!!
was it in t???
i mean did u no about graphite and concentric circles...... UAINNNNN!!!

 

[utsav156]

I got 4V and -0.12V! I hope that's okay though.. :S

And how do we know to how many significant figures our answers should be (unless specified in the question)? :S
They don't really penalize us for that, do they?

it should be in 2 or 3 sig depending on the question
ya i guess they do penalize!!

 

[utsav156]

arggghhh ...
i got da smae ans 4 op amp!!!
fingers crossed dat u r sooooooooooooooooooooooooo rite!!!!!
hated da diffraction ques
no one in ma scol tld me about it.... takin bout tchr
n didnt find it in pacific !!!
was it in t???
i mean did u no about graphite and concentric circles...... UAINNNNN!!!

dunnno about pacific wrkng hard but even i got the same ans!!!!
haha difdraction question how did ya made the diagram!!!!!

 

[workinghard]

i didnt evn no da ans :/
how could i make a dia?????
da gals wid me dae tld me dey hv bin taught that bout in their acd!!!
so still UAINNNNN..
btw glad our ans match!
hope v r both rite!!!!