awe I am getting 40 in physics .. ( my Teacher cross checked my ans) alhamdulillah .. but math .. I am still confused with answers
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IGCSE O/L student
oh, masha allah! congrats! well done!
it's fyn. u'll get a gud grade in maths.
it's fyn. u'll get a gud grade in maths.
shafayat
I pray so .. n u too pray !!
IGCSE O/L student
i do pray. i am a muslim, so obviously i do.
IGCSE O/L student
cn u tell me da ans 4 da reason y convection currents occur in a liquid. dere ws a question lyk dat, but i dnt knw xactly wat.
shafayat
because convection is caused .. by acctual movement of molecules
eg :- the molecule having the energy moves
whereas in conduction the molecules transfer energy by vibrations
thats it .. the answer was lid stops convection...
convection here is that the hot steam is rising right ?
so if there is a lid it willl trap the steam and reduce convection ...
eg :- the molecule having the energy moves
whereas in conduction the molecules transfer energy by vibrations
thats it .. the answer was lid stops convection...
convection here is that the hot steam is rising right ?
so if there is a lid it willl trap the steam and reduce convection ...
IGCSE O/L student
umm... my question is regardin a question in da paper
shafayat
thats right lid stops convection !!
IGCSE O/L student
thnx!!!
shafayat
hey listen !! if ur not clear ...
think about the vacuum flask... n think how lid stops convection there !! den u will knw
think about the vacuum flask... n think how lid stops convection there !! den u will knw
IGCSE O/L student
my question ws regardin da other question abt convection. one of da options ws da molecules of a liquid xpand. another option ws da liquid xpands. wt ws ur ans 2 dat?
shafayat
ohh that one was the speed of molecule increases
dude that wasnt convection ... it was about pressure
dude that wasnt convection ... it was about pressure
IGCSE O/L student
k, so wat ws da ans?
David Hussey
my answr 2 dat question abt the convection was tht molecules in liquids expand
there was one more about the pivot with 10 N acting on the top one towaards the rite and the othr towards the left
i ticked the option saying anticlockwise..is it correct?
because i noticed tht the force applied distance was far from the piston...so further away fr mthe piston easier 2 push? am i correct?....hope u undrstood my point..!
there was one more about the pivot with 10 N acting on the top one towaards the rite and the othr towards the left
i ticked the option saying anticlockwise..is it correct?
because i noticed tht the force applied distance was far from the piston...so further away fr mthe piston easier 2 push? am i correct?....hope u undrstood my point..!
IGCSE O/L student
OMG! thnx alot, david. dose were my ans, n i had da same concept in mind. i ws really worried abt my ans coz i wsnt sure. alhamdulillah, now dere is sum1 wid me.
David Hussey
i made one silly mistake!
the one about the bus..i tickd the centre of mass option!
i felt so stupid aftr the exam!
the one about the bus..i tickd the centre of mass option!
i felt so stupid aftr the exam!
IGCSE O/L student
it's ok. dnt wry. evrythin will b fyn. u cn cover up 4 it in da nxt pprs.
shafayat
it was the speed of molecule increases
hEbBoOo
Hay btw I took this exam and the thread at point Y had strain and kinetic energy?!?
physics ws kinda had. sum of da questions