Physics, Chemistry and Biology: Post your doubts here!

[@mtsharaf2]

i think its b

but hydrogen is used in fuel cells
i guess its A

 

[semsemhosam]

but hydrogen is used in fuel cells
i guess its A

oh wait i read the question wrong srry my mistake

 

[@mtsharaf2]

oh wait i read the question wrong srry my mistake

np !!
3ady bete7sal

 

[salvatore]

chemistry problem :
Which of the following isnt used as a fuel
a carbon monoxide
b hydrogen
c) methane
d) nitrogen
Thanks in advance

The answer is A.. Carbon monoxide is a harmful product of burning fuels

 

[koko288]

Plz plzzz need real help in physics paper6 my exam is next week help in precautions and some exp. Notes plzZzzzzzzzzzzz

 

[@mtsharaf2]

The answer is A.. Carbon monoxide is a harmful product of burning fuels

yeah (A)

 

[sparsha.mehta]

chemistry problem :
Which of the following isnt used as a fuel
a carbon monoxide
b hydrogen
c) methane
d) nitrogen
Thanks in advance

answer is A

 

[sparsha.mehta]

is pollen tube formed just before fertilization takes place(i.e. wen the pollen tube lands on the stigma?) or is it already formed???
urgent.... plz reply fast...!!!

pollen falls on the sticky stigma....it then develops into a pollen tube on the stigma.this tube grows till the ovary which fuses withit to form zygote....anything else

 

[Purple@white]

pollen falls on the sticky stigma....it then develops into a pollen tube on the stigma.this tube grows till the ovary which fuses withit to form zygote....anything else

if you noticed , bio exam is over... & i already got the answer from someone...

 

[sparsha.mehta]

if you noticed , bio exam is over... & i already got the answer from someone...

nooooo it cn hlp u in MCQssss
and whts wrong in getttting ans

 

[Ahmed Nasser]

whats isomers or i mean how to draw it ??

 

[Ahmed Nasser]

chemistry problem :
Which of the following isnt used as a fuel
a carbon monoxide
b hydrogen
c) methane
d) nitrogen
Thanks in advance

methane

 

[pooja9897]

methane

How can it be methane?!!? Its supposed to be CO.... Methane is used in natural gas, which is a fuel!!!!

 

[Ahmed Nasser]

How can it be methane?!!? Its supposed to be CO.... Methane is used in natural gas, which is a fuel!!!!

well, whats the answer on the mark scheme

 

[Saahil Parikh]

whats isomers or i mean how to draw it ??

isomers are like.. they have the same molecular formula but different structures...

 

[Ahmedm96]

does any one have useful notes for optics

and p6 physics in general and what to study for it
thank in advance

 

[Saahil Parikh]

physics doubt..

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w06_qp_3.pdf

Q. 1 b (iv).. thanks in advance

 

[Ahmedm96]

physics doubt..

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w06_qp_3.pdf

Q. 1 b (iv).. thanks in advance

use a sinker of known volume then get the reading from measuring cylinder and subtract initial volume of water+volume of sinker

 

[Saahil Parikh]

use a sinker of known volume then get the reading from measuring cylinder and subtract initial volume of water+volume of sinker

thnx

 

[Saahil Parikh]

but whats a sinker?