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Author Topic: ANY DOUBTS HERE!!!  (Read 34868 times)

Offline The SMA

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Re: ANY DOUBTS HERE!!!
« Reply #75 on: April 19, 2010, 11:19:39 am »
Need help plz! on A2 Maths paper 3 M/J 04
Q5 (i), Q8 and Q11 (ii)
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nid404

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Re: ANY DOUBTS HERE!!!
« Reply #76 on: April 19, 2010, 11:30:23 am »
Quote from: ~ A.F ~ on April 19, 2010, 11:27:19 am
in 7 minutes

thanks A.F
I'm trying to figure waves :-X :-[
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Offline sweetie

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Re: ANY DOUBTS HERE!!!
« Reply #77 on: April 19, 2010, 01:29:43 pm »
Quote from: nid404 on April 18, 2010, 10:43:54 am
15) C

when a compound has no charge...

u equate the ox states to 0
 A NH4Cl  NH4 has ox state of +1 so Cl will be -1   ruled out
 B NH4ClO3  +1 + (3x-2)[oxygen has state -2) + cl=0
                 Cl= +5   rule out
C NH4ClO4   +1 + (4X-2) + Cl=0
                  Cl=-7   here we got it :)


oops, i guess u xplained da wrong que., it waz q17!!!!!
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Offline sweetie

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Re: ANY DOUBTS HERE!!!
« Reply #78 on: April 19, 2010, 01:34:20 pm »
Quote from: nid404 on April 18, 2010, 10:35:07 am
11)
         2HI(g)<-----> H2(g) + I2(g)

initial     b                   0         0
final      b-x                 x          x

total no of moles= 4
pressure = p
*pp=partial pressure
Kp= ppI2 XppH2/ pHI2
ppI2 and H2= x/4 Xp  ( moles/total no of moles X total pressure)
ppHI= b-x/4 Xp

Kp= (xp/4)X (xp/4)
       -------------
          ((b-x)p/4)2
=___x_2__
   4(b – x)2
D

but when i simplified the eqn. u got for Kp i didnt get the rite ans.

cud u plz solve it and send it to me??????
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nid404

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Re: ANY DOUBTS HERE!!!
« Reply #79 on: April 19, 2010, 08:06:49 pm »
Quote from: notty_me on April 19, 2010, 01:34:20 pm
but when i simplified the eqn. u got for Kp i didnt get the rite ans.

cud u plz solve it and send it to me??????

ok my bad...
that four kinda vanishes...ill do it agn..i must've made a mistake in a hurry
ill check
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Offline Metallicnak

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Re: ANY DOUBTS HERE!!!
« Reply #80 on: April 22, 2010, 06:26:53 am »

 BIO!!!!!

Hey guys can someone explain to me the formation of the plant cell wall during plant cell cytokinesis ???, its annoying and my book doesnt explain it that well
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Amr Fouad

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Re: ANY DOUBTS HERE!!!
« Reply #81 on: April 22, 2010, 11:49:15 am »
Quote from: Metallicnak on April 22, 2010, 06:26:53 am
BIO!!!!!

Hey guys can someone explain to me the formation of the plant cell wall during plant cell cytokinesis ???, its annoying and my book doesnt explain it that well
um sure nid can help. Shes our super duper bio geek :P lol
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nid404

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Re: ANY DOUBTS HERE!!!
« Reply #82 on: April 22, 2010, 11:53:58 am »
Quote from: Metallicnak on April 22, 2010, 06:26:53 am
BIO!!!!!

Hey guys can someone explain to me the formation of the plant cell wall during plant cell cytokinesis ???, its annoying and my book doesnt explain it that well

Like what... :-\

Is this A2  ???

I'm really not getting you...can you show this to me in the syllabus
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Offline Metallicnak

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Re: ANY DOUBTS HERE!!!
« Reply #83 on: April 22, 2010, 01:47:32 pm »
Quote from: nid404 on April 22, 2010, 11:53:58 am
Like what... :-\

Is this A2  ???

I'm really not getting you...can you show this to me in the syllabus


Nope it isnt A2, its in chapter 4 Biodiversity and natural resources pg-147  of the AS Bio textbook(black one) as for the syllabus (Topic 4 unit2) its a part of the 3rd and 4th points I gues :-\


Sorryzzzz to trouble u :-[ but for stem cells found in the embroyo it goes through continous divisions to maybe form a single blood cell which then cells divide to form range of blood cells until it loses its ability to further divide right ??? 
   
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Offline zb

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Re: ANY DOUBTS HERE!!!
« Reply #84 on: April 22, 2010, 11:19:04 pm »
asalamoalaikum... I have a qn from edexcel AS physics... A person weighing 100 N stands on some bathroom scales in a lift. If the scales show a reading of 110 N ,which answer could describe the motion of the lift?  A. moving downwards and decelerating       B. Moving downwards with constant velocity       C. Moving upwards and decelerating         D. Moving upwards with a constant velocity       thanks alot jaza kALLAH khairan :)
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Offline T.Q

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Re: ANY DOUBTS HERE!!!
« Reply #85 on: April 22, 2010, 11:46:00 pm »
Quote from: zb on April 22, 2010, 11:19:04 pm
asalamoalaikum... I have a qn from edexcel AS physics... A person weighing 100 N stands on some bathroom scales in a lift. If the scales show a reading of 110 N ,which answer could describe the motion of the lift?  A. moving downwards and decelerating       B. Moving downwards with constant velocity       C. Moving upwards and decelerating         D. Moving upwards with a constant velocity       thanks alot jaza kALLAH khairan :)
wa alikom il salam

the answer is D
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Offline Metallicnak

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Re: ANY DOUBTS HERE!!!
« Reply #86 on: April 23, 2010, 11:27:06 am »
Quote from: Metallicnak on April 22, 2010, 01:47:32 pm

Nope it isnt A2, its in chapter 4 Biodiversity and natural resources pg-147  of the AS Bio textbook(black one) as for the syllabus (Topic 4 unit2) its a part of the 3rd and 4th points I gues :-\


Sorryzzzz to trouble u :-[ but for stem cells found in the embroyo it goes through continous divisions to maybe form a single blood cell which then cells divide to form range of blood cells until it loses its ability to further divide right ??? 
   

guys.... some help wuld be nice! >:( ........  and does any one hve the jan 2010 6B102 and 6B107
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nid404

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Re: ANY DOUBTS HERE!!!
« Reply #87 on: April 23, 2010, 11:28:46 am »
Quote from: Metallicnak on April 23, 2010, 11:27:06 am
guys.... some help wuld be nice! >:( ........  and does any one hve the jan 2010 6B102 and 6B107

im sorry...that seems like edexcel...no wonder it's not in my textbook :-\
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Offline Metallicnak

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Re: ANY DOUBTS HERE!!!
« Reply #88 on: April 23, 2010, 11:39:20 am »
Quote from: nid404 on April 23, 2010, 11:28:46 am
im sorry...that seems like edexcel...no wonder it's not in my textbook :-\


so all the edexcel bio guyz out there HELP! Plzzzz
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Offline zb

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Re: ANY DOUBTS HERE!!!
« Reply #89 on: April 23, 2010, 02:01:40 pm »
Quote from: T.Q on April 22, 2010, 11:46:00 pm
wa alikom il salam

the answer is D
         how come???? Mark scheme says moving downwards and decelerating? The question is from jan 2010 unit 1 question 6 thanks
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