Physics, Chemistry and Biology: Post your doubts here!

NOneed2speedd

NOneed2speedd

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loaie Amgad said:
Hey man .... I have a question
You once told me that we should use a pen for drawing diagrams of bonds in paper 3
But it states clearly on the very first page that we should use a pencil for diagrams
Now What hhhhhh????
Could you please turn out and tell me
Thanks in advance man......
Click to expand...
it's not a problem pen or pencil. .. ur answer should be correct
 
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Saad the Paki

Saad the Paki

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loaie Amgad said:
Hey man .... I have a question
You once told me that we should use a pen for drawing diagrams of bonds in paper 3
But it states clearly on the very first page that we should use a pencil for diagrams
Now What hhhhhh????
Could you please turn out and tell me
Thanks in advance man......
Click to expand...
Oh well.. now im confused too....
I never actually bothered to read the instructions
But they say u MAY not u MUST
Now i think pencil is better since they r instructing us to do so
 
Shandana khan

Shandana khan

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Physics 0625..Dear friends plzz help...in question no: 9 (c)
 

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loaie Amgad

loaie Amgad

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Saad the Paki said:
Oh well.. now im confused too....
I never actually bothered to read the instructions
But they say u MAY not u MUST
Now i think pencil is better since they r instructing us to do so
Click to expand...
despite the fact that it was a silly topic but we at least came to know something .
Well thanks for your help bro....
 
qwertypoiu

qwertypoiu

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Shandana khan said:
Physics 0625..Dear friends plzz help...in question no: 9 (c)
Click to expand...

Consider Y:
Since length is proportional to resistance,
Half length = half resistance (x1/2) <----- this means TIMES 1/2

And since area is inversely proportional to resistance,
One third cross sectional area = three times the resistance (x3)

Overall resistance compared to X = (x3/2)

Now since current flow is inversely proportional to resistance:
Amount of current flowing compared to X = (x2/3)

Therefore, current in Y over X = (2/3) over 1 = 2/3
 
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I

Iris Dylan Lane

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Muaaz Iqbal said:
Any anybody explain me this question?
:DView attachment 53796
Click to expand...

Not my answer:
If you look at the plot, the height of precipitate increases linearly until you've added 8ml of phosphate solution, then levels out. That means at 8ml phosphate, you've precipitated all of the metal. It takes 8ml to react completely with 12ml of the T solution, or 2:3. That's the ratio of volumes, and since the solutions are of equal concentrations, it's also the phosphate:T ratio in the compound. Hence the formula is T3(PO4)2. T has a 2+ charge.
 
DANISH182

DANISH182

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guys tips for p3 chem i am very bad in it i hate p3

plz ur help would be really appreciated
 
Sariya Khan

Sariya Khan

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DANISH182 said:
ok but i dont know the limiting reactant i have spend many hours reading it but no use
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The reactant(substance) in a reaction which is in a limited supple hence limiting the time of the reaction. For example, a plant has very low water.. When all the water will be used up by the plant,there will be no more..right? So photosynthesis will automatically stop.
So in this case WATER is a limiting reactant ..Hope this helps you :)
 
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