Biology; Chemistry; Physics: Post your doubts here!

[asadalam]

Won't 9 be A, as it is being constantly stirred until no further change in temp is there? If we stirred it and then left it, then it would have been B

No i guess as endo always have this typical curve and it said till no further change and there is a slight straight line before it rises again.
And i also realised a mistake in my 6 part, as it is B.When i reread it i saw a has propene which obviously cant make an ester and there are 3 carbon atoms in both so they are propanol and propanoic acid.

 

[Muhammad_Hamza]

Please help me in this part of chemistry (Atp) paper. I have drawn all the points on the graph but the question says draw two Intersecting straight lines. I got only one straight line. where is the second one? Please Complete the graph and where is the second line?

 

[Shafin Ahmed]

Fusing is fertilization and not ovulation

What I mean is that WONT the sperms die at day 13 if not entered into the egg

 

[asadalam]

Please help me in this part of chemistry (Atp) paper. I have drawn all the points on the graph but the question says draw two Intersecting straight lines. I got only one straight line. where is the second one? Please Complete the graph and where is the second line?

What they mean is 2 draw 2 straight lines like that 1 black and 1 green i have shown.When the intersect they form the points.

 

[Muhammad_Hamza]

View attachment 41838
What they mean is 2 draw 2 straight lines like that 1 black and 1 green i have shown.When the intersect they form the points.

Thanks man!

 

[exploded diper]

y yellow?.....

 

[exploded diper]

Assalamu Walaikum,
I have a doubt on Biology MCQ as follows:
http://papers.xtremepapers.com/CIE/Cambridge International O Level/Biology (5090)/5090_s10_qp_11.pdf

For Question no 35 , the answer is D and the explanation in Examiners Report is
"Sperm deposited on day 10 will still be viable on day 13. Eggs ovulated on day 15 are still viable on
day 17, so the fertile period extends for 7 days."

I don't quite get it. After being viable on day 13 , sperms will die so how will they fuse with eggs ovulated on day 15. Moreover, even if not fused then the E.R means that it can even be fused in day 17 ! How is that possible?

Anyone please explain it to me?

its Aslam O Alaikum.....

 

[Muhammad_Hamza]

y yellow?.....

yellow colour?

 

[FLRNAB]

Yes, I do

Do you find any use for the smaller curve? The one which is like yin-yang

 

[exploded diper]

Does anyone else use french curves for drawing graphs?

isnt it diificult to use it....wouldnt it take more time.......

 

[exploded diper]

yep...

yellow colour?

 

[FLRNAB]

isnt it diificult to use it....wouldnt it take more time.......

They are so easy. It takes me 1/4 time to draw with curves than I would take to draw free hand and erasing etc.

 

[exploded diper]

They are so easy. It takes me 1/4 time to draw with curves than I would take to draw free hand and erasing etc.

r u sure?

 

[FLRNAB]

r u sure?

Yeah pretty sure because I did all the past paper Physics ATP graphs with em.

 

[exploded diper]

this year?

Yeah pretty sure because I did all the past paper Physics ATP graphs with em.

 

[exploded diper]

show me one of ur graphs

Yeah pretty sure because I did all the past paper Physics ATP graphs with em.

 

[exploded diper]

AWESOME!!!!!

 

[funky brat]

Guys, how many of you score full marks in Chemistry ATP?

 

[Awesome12]

Guys, how many of you score full marks in Chemistry ATP?

I didn't even start yet

 

[Tuba noor]

i also not started yet
will start from tommorrow