Biology; Chemistry; Physics: Post your doubts here!

[Dark Destination]

le question
View attachment 43656

le anwer...
Q10:bView attachment 43657


i know this isnt a maths thread but i couldnt find any other place to put it...

https://www.xtremepapers.com/commun...hs-and-statistics-post-your-doubts-here.4773/

 

[exploded diper]

https://www.xtremepapers.com/commun...hs-and-statistics-post-your-doubts-here.4773/

thx mate ... do u know how to solve it though/

 

[Dark Destination]

thx mate ... do u know how to solve it though/

Yes, replied there.

 

[Faadi1997]

except for K, Na, Ca, Mg and NH3 rest of OHs are insoluble.

Calcium hydroxide is soluble in water dude

 

[***amd***]

Calcium hydroxide is soluble in water dude

and what did i say?

 

[finnan]

NITROGEN kahan se agya????
C is the answer

lolz C answer is nitrogen

 

[kirann]

lolz C answer is nitrogen

chem is finished... plz no more chem now

 

[finnan]

ohk budy cool now

 

[HASEEB SAEED]

heres help for u all pls like my answers in https://www.xtremepapers.com/commun...otes-online-and-also-post-doubts-dudes.33997/ and also post doubts

 

[Harsh Poddar]

I've made this site that can be used to quickly access past papers to all the subjects of O Level, IGCSE, and AS and A level students. Try it out and please give feedback. Already being used in 59 countries by over 1500 students.

O Level: gopapers.net/olevel.html
IGCSE: gopapers.net/igcse.html
A & AS Level: gopapers.net/alevel.html

 

[Gohar Awais]

Hi, my question is and MCQ I got on my End of year exam i couldn't figure it out so here it is
When a 1oo g mass is applied to a spring its length (original+extension)changes to 27.2 cm
When the mass is replaced by 600 g the length is now 89.7 cm
so what will be the length of the spring when the 600 g is replaced with a 200 g mass?
A 29.9 cm
B 33.4 cm
C 39.7 cm
D 54.4 cm

 

[What is life]

Is anyone appearing for environmental management?

 

[Dark Destination]

What exactly was the answer to the first question in physics atp this time?
We had to measure the length... of the rod above the water..

I wrote about dipping a rule in the water, with the zero mark co-inciding with the water level, and then using as set-square to take the reading..

Will i get the marks?

 

[Ram97]

What exactly was the answer to the first question in physics atp this time?
We had to measure the length... of the rod above the water..

I wrote about dipping a rule in the water, with the zero mark co-inciding with the water level, and then using as set-square to take the reading..

Will i get the marks?

I think we had a long discussion on it

 

[Mohame Areeh]

30 A wire hangs between the poles of a magnet.
When there is a current in the wire, in which direction does the wire move?
5054/1/M/J03
why is this answer?????
plx answer me as soon possilbe

 

[Mohame Areeh]

29 Each of the diagrams below is a cross-section through two parallel current-carrying conductors.
Which diagram correctly shows the magnetic field pattern formed by the currents in the two
conductors?
This question also.... 5054/1/M/J03

 

[fatimarehman]

In our biology paper the question came that which pollination is likely to take place before a flower opens? so can the answer of this question be insect pollination. please reply it soon.thanks in advance.

 

[Mohame Areeh]

In many flowers, there are "honeypots" called nectaries at the base of the inside of the flower, where the filaments, and the petals all join together at the base of the ovary. To get to these nectaries, a pollinating insect (like a honeybee) must go through a gauntlet of other structures. Typically, the first flower part passed is the stigma, and pollen clinging to the insect can get transferred from the insect to the stigma. The insect travels deeper into the flower, gets a drink of nectar, and backs out of the flower to leave. As it does so, it brushes by the pollen-laden anthers, and gets covered in pollen. It leaves the flower, and takes this load of pollen to the next flower, thus creating cross-pollination.

In our biology paper the question came that which pollination is likely to take place before a flower opens? so can the answer of this question be insect pollination. please reply it soon.thanks in advance.

 

[fatimarehman]

mostly students wrote self pollination as an answer to this question so i am confused can insect pollination be an answer to this question because it was a different question came in our recent june 2014 exams. please reply soon.

 

[asadalam]

mostly students wrote self pollination as an answer to this question so i am confused can insect pollination be an answer to this question because it was a different question came in our recent june 2014 exams. please reply soon.

IIRC,it was a wind pollinated plant,and thus wouldn't pose any attraction to insects,so they would have no reason to come and pollinate.So i dont think so.