Qualification > Sciences
Physics Discussion HERE ONLY!
Triple_A:
i wrote the fraction 4/5.......... :(
i didnt take 10% for the 2nd day............o crap!! :-\
zmnigcse:
--- Quote from: noor92 on June 05, 2009, 04:13:36 am ---Why would you divide refractive index by one?? I did
R.I = sin i/sin r ...
1.49 = sin 35 / sin r
and my answer was 23. something
--- End quote ---
Well that's kinda like the thing. I did that first too. and then i realised that the ray that's coming out of the medium A is bending AWAY from the normal :-\
So I decided to switch the fraction. I think you can use 1/refractive index, OR sin r/sin i... i remembered that cuz i saw it in the mark scheme of some old paper
yes and i think it was 57 or something like that... :D
The paper was actually QUITE challenging... :(
sandydandy:
I think i must have lost 10 marks on the question of the kinetic energy. i did loss of potential energy is gain of kinetic energy so instead of using a half mv squared, i used mgh!! someone help am i completely wrong?? i also wrote A for the diode question. Question 1 first variant paper.. who knows the answer..
leebux101:
who agrees with me tht this ppr was hard......i did the second variant......it was soooo hard....i am gna loose soooooooooooo many marks...and i am the best one in class in physics..i always get full in it...i messed up big time... :'(
i came home and i burst out crying.....i am still so depressed....
joe kath:
man...i agree wid u....it wz pretty hard....bt some questions were lil easy....so i'll lose less marks...no worries...by da way bakhtawar....wich skool do u study in...???
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