Physics paper 31 , (a death call)

[IGCSE O/L student]

yea but how to change petroleum to butane and butane to butene?

oh, sry!
i didnt read the question
u make butene by making shorter chained alkanes and alkenes from petroleum using the cracking process.
when you crack petroleum, you get butene as one of the alkenes.
hydrate butene as I mentioned previously to make butanol

 

[Jisu]

yea but how to change petroleum to butane and butane to butene?

catalytic crackin

 

[Jisu]

hey ppl
wat does make use of a fiducial aid mean??

 

[areebaization]

u dont get me
i drew half of a semi circle as in a quarter of a circle to the right side

Umm no....I guess that was for a wide gap this one was narrow :/

 

[IGCSE O/L student]

hey ppl
wat does make use of a fiducial aid mean??

I have no idea, bro!

 

[areebaization]

in evaporation heat is lost from the liquid but the particles that actually changed state have absorbed energy

that's what i just said

 

[IGCSE O/L student]

in evaporation heat is lost from the liquid but the particles that actually changed state have absorbed energy

so evaporation is wrong

 

[bluefa1con]

so evaporation is wrong

yeah

 

[ShahdTarifi]

you gusy can u plzz restate the resistors of the parallel circuits ??
and the total exam is out of what ?

 

[Jisu]

Umm no....I guess that was for a wide gap this one was narrow :/

i knew da right way
but i got confused wen it said to da right side toughing point P
do u know how many marks it was for?

 

[areebaization]

i knew da right way
but i got confused wen it said to da right side toughing point P
do u know how many marks it was for?

I guess 1mark

 

[Abu mota]

here we go again!
dats wrng 2. i wrote:
da molecules @ da surface
gain a higher avg kinetic energy
n so leave da surface of da liquid.

IT ISNOT WRONG, the glass expanding is impossible because expansion of solids cant be noticed!!!!!!!!! i dont know why u guys say the expansion of the flask, it just doesnt make sense, also why is evaporation wrong, evaporation can happen at any temperature and rapidly too, so think about it it can never be expansion of the flask. maybe both are right but im 100% sure that evaporation is right and nobody can prove otherwise, ty

 

[IGCSE O/L student]

IT ISNOT WRONG, the glass expanding is impossible because expansion of solids cant be noticed!!!!!!!!! i dont know why u guys say the expansion of the flask, it just doesnt make sense, also why is evaporation wrong, evaporation can happen at any temperature and rapidly too, so think about it it can never be expansion of the flask. maybe both are right but im 100% sure that evaporation is right and nobody can prove otherwise, ty

thank you thank you thank you.
i'm happy there is a possibility of gaining marks.
alhamdulillah!
jazakallahu khairan!

 

[sammm]

YES IT WAS
TO RIGHT

 

[areebaization]

expansion of solids cant be noticed!

Ever heard of railway line expansion? I am pretty sure railway lines R solid

 

[IGCSE O/L student]

Ever heard of railway line expansion? I am pretty sure railway lines R solid

but areeba, wouldn't the expansion of the glass flask be small and slow??

 

[areebaization]

but areeba, wouldn't the expansion of the glass flask be small and slow??

LOL! that's y the liquid expands first....I guess we should wait for the marking scheme to come out...discussing here is kinda useless :/

 

[IGCSE O/L student]

LOL! that's y the liquid expands first....I guess we should wait for the marking scheme to come out...discussing here is kinda useless :/

I guess so tooo! but i'm kinda worried!

 

[areebaization]

I guess so tooo! but i'm kinda worried!

most of ur answers r right girl! Think about I had been good in physics through out the year and totally screwed up 3 Qs

 

[ShahdTarifi]

I am absolutely sure that the flask expands first !!! ill try to get a picture or document and post it !!