Originally posted by dadeadman1337:Qn 11 can't be C, what kind of potential energy does it convert to?
I think overall i got 4 wrongs
opps , sorry, i left that out. haha
it should be
kinetic- > heat.
lol that means i got 2 huh >_>
that sucks man . =.=
okay. Q4. pls lay out working plz. can't be B. Moi ans ish C.
Q10 moi ans is B (how can it be C???)
Q11 B (comfirmed)
Q15 (need help)
Q20. Should be C cannot be B! (moi reason. how can the reflected ray be bending out of the normal ???. B is possible cuz total internal reflection may be v. small [optical fibre], convinced by the beginning of the reflected ray.)
Q28, my fav. Answer should either be A or D. no other answers.
anyway, i think i will get oni 30/40
Originally posted by tr@nsp0rt_F3V3R:okay. Q4. pls lay out working plz. can't be B. Moi ans ish C.
Q10 moi ans is B (how can it be C???)
Q11 B (comfirmed)
Q15 (need help)
Q20. Should be C cannot be B! (moi reason. how can the reflected ray be bending out of the normal ???. B is possible cuz total internal reflection may be v. small [optical fibre], convinced by the beginning of the reflected ray.)
Q28, my fav. Answer should either be A or D. no other answers.
For Qn 20, look at the ray as it passes out of the glass block. It bends towards the normal, when it should be bending away.
Qn 15 is 8g - <1700J/(340J/g)>
Can't explain Qns 10 and 28 since i got them wrong
10 -
same height same pressure, enuff said ~.~
28 . read direction carefully and examine the function of a diode.
the phrase' passing a current through the battery in the opposite direction to that when it is discharging'
'it' refers to the battery . and the direction of the battery discharging is from + to - . hence my A.C needs to go in the direction to '+ ' of battery. hence i need find a diode which allows current to flow to '+' . which is A .
lol. read trhis
http://singaporeseen.stomp.com.sg/stomp/sgseen/what_bugs_me/277928/moe_approved_physics_textbook_teaches.html#commentSection
guy cried because of that air/vaccuum question . lmao